Related to
https://linear.app/getsentry/issue/EME-550/ios-insights-duplicate-files

Write PDF/SVG raw data to disk during asset catalog parsing to enable
duplicate detection of SVG and pdf files

(closes #3028)
(closes
[CLI-247](https://linear.app/getsentry/issue/CLI-247/version-2583-includes-a-postinstall-script-that-is-incompatible-with))

This fixes the postinstall scripts for package managers other than NPM.

---------

Co-authored-by: Daniel Szoke <7881302+szokeasaurusrex@users.noreply.github.com>

See
https://github.com/getsentry/sentry-cli/pull/3030/changes#r2613671595

### Description
Set minimum supported self-hosted version, and add this to README.

### Issues
- Resolves #3026
- Resolves [CLI-246](https://linear.app/getsentry/issue/CLI-246/mention-minimum-supported-self-hosted-version-in-readme)

⚠️ **Breaking change:** Do not merge until ready to release in a major.

Remove the `--app-id`, `--version`, and `--version-code` arguments to the `sentry-cli upload-proguard` command. Users currently using these arguments should simply stop using them. With this change, we also no longer wait for assembly of the mapping to finish on the backend; previously we needed to wait to associate the release.

This change also removes any code that had been called when these flags were specified.

 - Resolves #2868
 - Resolves [CLI-197](https://linear.app/getsentry/issue/CLI-197/remove-flags-for-setting-release)

⚠️ **Breaking change:** Do not merge until ready to release in a major.

As Sentry CLI 3.0.0 will only support Sentry servers with chunk uploading support, we can now assume that 404 errors from the `/organizations/{org}/chunk-upload/` endpoint are due to the organization not existing, and not due to the chunk upload endpoint not existing.

- Resolves #2900
- Resolves [CLI-211](https://linear.app/getsentry/issue/CLI-211/assume-404-when-getting-chunk-upload-endpoint-is-due-to-non-existent)

________

BREAKING CHANGE: Several subcommands no longer support Sentry servers which lack support for chunked uploads.

### Description
⚠️ **Breaking change:** Do not merge until ready to release in a major.

Use chunked uploading for `sentry-cli upload-proguard`, as chunked uploads are generally more reliable than non-chunked uploads, and chunked uploading is the uploading method used by all other file uploading commands in Sentry CLI.

Users who previously had set the `SENTRY_EXPERIMENTAL_PROGUARD_CHUNK_UPLOAD` environment variable to opt into the chunk uploading behavior no longer need to set this variable, as all ProGuard files are always uploaded with chunked uploading.

### Issues
- Resolves #2328
- Resolves [CLI-13](https://linear.app/getsentry/issue/CLI-13/make-chunk-uploads-the-default-for-proguard-files)

_______

BREAKING CHANGE: The `sentry-cli upload-proguard` file can no longer upload to Sentry servers which lack support for receiving ProGuard mappings via chunked upload.

⚠️ **Breaking change:** Do not merge until ready to release in a major.

Removed support for the legacy API key authentication method. Users must now use auth tokens instead.

Specifically, users supplying an API key via any of the following options need to generate and use an auth token instead:

  - `--api-key` CLI flag
  - `SENTRY_API_KEY` environment variable
  - `api_key` configuration file field
  - `apiKey` option in the JavaScript API

- Resolves #2873
- Resolves [CLI-199](https://linear.app/getsentry/issue/CLI-199/remove-api-key-authentication)

_____

BREAKING CHANGE: API-key based authentication is no longer supported. The `--api-key` CLI flag and `apiKey` JS option have been removed; the `SENTRY_API_KEY` environment variable and `api_key` configuration file field are no longer read.

### Description
This argument does not do anything, so we will remove it.

### Issues
- Resolves #2874
- Resolves [CLI-200](https://linear.app/getsentry/issue/CLI-200/remove-upload-proguards-android-manifest-argument)

### Description
Removed the `sentry-cli sourcemaps explain` command, which has been deprecated for some time.

### Issues
- Resolves #2865
- Resolves [CLI-2865](https://linear.app/getsentry/issue/CLI-195/remove-sentry-cli-sourcemaps-explain-command)

### Description
Remove the deprecated `--platform` argument.

### Issues
- Resolves #2851
- Resolves [CLI-193](https://linear.app/getsentry/issue/CLI-193/remove-upload-proguard-platform-flag)

### Description
Removed support for non-chunked uploads of debug files.

### Issues
- Resolves #2950
- Resolves [CLI-227](https://linear.app/getsentry/issue/CLI-227/remove-support-for-non-chunked-debug-file-uploads)

### Description
All debug file formats have been supported for at least three years, so with the Sentry CLI 3.0 release, all servers we support will support all debug file formats. Therefore, checking supported formats is no longer needed.

### Issues
- Resolves #2953
- Resolves [CLI-229](https://linear.app/getsentry/issue/CLI-229/assume-server-supports-all-debug-file-formats)

### Description
Remove all `sentry-cli files ...` subcommands. Also, remove the `sentry-cli releases files ...` commands, which are aliases for the `files` subcommands.

### Issues
- Resolves #2513
- Resolves [CLI-85](https://linear.app/getsentry/issue/CLI-85/remove-all-files-subcommands)

### Description
Following #2956, the `UploadContext` struct's `projects` field is always `Some`, indicating we have at least one project.

Here, we change the type from `Option<NonEmptySlice>` to `NonEmptySlice` to indicate that we always have a project set.

### Description
Remove support for non-chunked sourcemaps uploads. Also, drop `ReleaseFiles` chunk upload capability, as we now assume that all servers support chunked uploads for release files.

### Issues
- Resolves #2949
- Resolves [CLI-226](https://linear.app/getsentry/issue/CLI-226/remove-support-for-non-chunked-sourcemap-uploads)

### Description
Remove support for the deprecated release bundle uploads. Source maps are always uploaded as artifact bundles, now.

Also, we now assume all Sentry servers support `ArtifactBundle` and `ArtifactBundleV2`.

### Issues
- Resolves #2842
- Resolves [CLI-188](https://linear.app/getsentry/issue/CLI-188/remove-support-for-release-bundle-uploads)