Use lineage instead of api_name for property conflicts

[modular-magician]

Fixes #6967

Within google_compute_url_map, both default_url_redirect and path_matcher.default_url_redirect exist, as well as default_route_action and path_matcher.default_route_action. default_url_redirect is set to conflict with default_route_action, but the path_matcher subfields are not intended to conflict with anything.

The logic to generate ConflictsWith used api_name which does not differentiate between the two versions of each field, causing the path_matcher subfields to conflict with the top-level fields. Using lineage instead of api_name will remove these unintended conflicts.

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• Searched through the issue tracker for an open issue that this either resolves or contributes to, commented on it to claim it, and written "fixes {url}" or "part of {url}" in this PR description. If there were no relevant open issues, I opened one and commented that I would like to work on it (not necessary for very small changes).
• Generated Terraform, and ran make test and make lint to ensure it passes unit and linter tests.
• Ensured that all new fields I added that can be set by a user appear in at least one example (for generated resources) or third_party test (for handwritten resources or update tests).
• Ran relevant acceptance tests (If the acceptance tests do not yet pass or you are unable to run them, please let your reviewer know).
• Read the Release Notes Guide before writing my release note below.

Release Note Template for Downstream PRs (will be copied)

compute: fixed an issue where `google_compute_url_map` `path_matcher.default_route_action` would conflict with `default_url_redirect`

Derived from GoogleCloudPlatform/magic-modules#3885

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