Pass plugin name from Piped to plugin

[t-kikuc]

What this PR does:

• Deleted the name arg from sdk.NewPlugin()
• Instead, pass the name from the piped plugin config

After merging this PR, we need to update the plugins.

Why we need it:

• The uniqueness scope of name is confusing for plugin developers
• Currently, users need to get plugin names from each plugin code since they must be matched
  • Now, deploymentSource is looked up by the name defined in the plugin.
    

    pipecd/pkg/plugin/sdk/deployment_source.go

    Lines 42 to 51 in 8dbe938

    	// newDeploymentSource converts the common.DeploymentSource to the internal representation.
    	func newDeploymentSource[Spec any](pluginName string, source *common.DeploymentSource) (DeploymentSource[Spec], error) {
    	cfg, err := config.DecodeYAML[*ApplicationConfig[Spec]](source.GetApplicationConfig())
    	if err != nil {
    	return DeploymentSource[Spec]{}, fmt.Errorf("failed to decode application config: %w", err)
    	}
    	if err := cfg.Spec.parsePluginConfig(pluginName); err != nil {
    	return DeploymentSource[Spec]{}, fmt.Errorf("failed to parse plugin config: %w", err)
    	}

Which issue(s) this PR fixes:

Part of #5530

Does this PR introduce a user-facing change?:

This is a breaking change of the SDK. Not a user-facing change.

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[t-kikuc]

This name is not important. And p.name is empty when showing this message.

[t-kikuc]

This name is not important. And p.name is empty when showing this message.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.

Project coverage is 28.46%. Comparing base (e1fcf93) to head (8dbe938).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/plugin/sdk/plugin.go	0.00%	6 Missing ⚠️
pkg/app/pipedv1/cmd/piped/piped.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5931      +/-   ##
==========================================
- Coverage   28.46%   28.46%   -0.01%     
==========================================
  Files         520      520              
  Lines       56416    56419       +3     
==========================================
  Hits        16061    16061              
- Misses      39089    39092       +3     
  Partials     1266     1266              

Flag	Coverage Δ
.	23.74% <0.00%> (-0.01%)	⬇️
.-pkg-app-pipedv1-plugin-example	0.00% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes	66.42% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes_multicluster	67.51% <ø> (ø)
.-pkg-app-pipedv1-plugin-wait	35.51% <ø> (ø)
.-pkg-plugin-sdk	49.14% <0.00%> (-0.06%)	⬇️
.-tool-actions-gh-release	19.23% <ø> (ø)
.-tool-actions-plan-preview	25.30% <ø> (ø)
.-tool-codegen-protoc-gen-auth	0.00% <ø> (ø)

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[ffjlabo]

👍

[khanhtc1202]

Great catch, thank you 👍