Revisit tool used for generating/validating API goldens

[devversion]

We should revisit our options for the API goldens. ts-api-guardian has known limitations with aliased symbol exports and standalone export statements.

At some point in the past, the tooling team thought about using api-extractor from Microsoft. We should explore this option. The api-extractor is already used in @angular/bazel too.

Related to #17717

[devversion]

This hasn't been an issue for quite some while now. ts-api-guardian will be moved to the shared dev-infra package in the future, so we'll continue using it.

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