Optimize AWS provider startup metadata checks

[corymhall]

Summary

This PR moves a few AWS-specific provider startup decisions out of live Terraform schema inspection and into generated metadata.

The provider currently needs resource-level facts for:

• generic name autonaming
• region pre-check callback installation
• SDKv2 tags / tags_all pre-check handling

For AWS, asking live schemas for those facts during runtime provider construction can trigger expensive SDKv2 SchemaFunc paths and large allocations. This PR adds aws-resource-metadata.json, generated during tfgen, and uses that embedded metadata at runtime instead.

Details

• Adds generated AWS resource metadata for hasInputName, hasUsableRegion, and hasTagsAndTagsAll.
• Updates ProviderFromMeta to use embedded metadata for runtime callback/autonaming decisions.
• Adds a tfgen-only provider construction path that computes those facts from live schemas and refreshes the generated metadata file during schema generation.
• Keeps SDKv2 tag handling explicitly gated in resources.go; Plugin Framework resources continue to rely on upstream behavior.
• Adds parity tests that compare embedded metadata against live schema facts.
• Adds behavior tests for region callback installation, SDKv2-only tags callback handling, and generic autonaming behavior.

Refs #6357

Notes

aws-resource-metadata.json intentionally omits resources where all generated facts are false. At runtime, a missing key means zero-value metadata. Provider upgrades should refresh this file through schema generation; the parity tests are intended to catch stale metadata.

Testing

• cd provider && go test -v -short .
• cd provider && go test -v -short -run 'Test(HasNonComputedTagsAndTagsAllOptimized|HasOptionalOrRequiredNamePropertyOptimized|HasUsableRegionMetadata|RegionPreCheckCallbackInstalledFromMetadata|TagsPreCheckCallbackAppliesOnlyToSDKV2Resources|SetAutonamingAddsGenericNameWithoutOverwritingFields|CustomAutoNameTransforms)$' .
• bin/pulumi-tfgen-aws schema --out /private/tmp/pulumi-aws-schema-metadata --skip-docs --skip-examples
• gofmt -l provider/resources.go provider/resources_test.go provider/region.go provider/tags.go provider/cmd/pulumi-tfgen-aws/main.go
• git diff --check

[github-actions]

Does the PR have any schema changes?

Looking good! No breaking changes found.
No new resources/functions.

Maintainer note: consult the runbook for dealing with any breaking changes.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 15.98%. Comparing base (dc5ba2b) to head (b8f39a6).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6365   +/-   ##
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  Coverage   15.98%   15.98%           
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  Files         374      374           
  Lines       91298    91298           
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  Hits        14596    14596           
  Misses      76682    76682           
  Partials       20       20           

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[github-actions]

No actionable issues found.

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[pulumi-bot]

This PR has been shipped in release v7.34.0.