feat(compiler-cli): expose ngtsc as a TscPlugin (#28435)

This lets us run ngtsc under the tsc_wrapped custom compiler (Used in Bazel)
It also allows others to simply wire ngtsc into an existing typescript compilation binary

PR Close #28435

packages/compiler-cli/integrationtest/test_helpers.js

@@ -36,6 +36,8 @@ const requiredNodeModules = {
   '@angular/platform-server':
       resolveNpmTreeArtifact('angular/packages/platform-server/npm_package'),
   '@angular/router': resolveNpmTreeArtifact('angular/packages/router/npm_package'),
+  // Note, @bazel/typescript does not appear here because it's not listed as a dependency of
+  // @angular/compiler-cli
   '@types/jasmine': resolveNpmTreeArtifact('ngdeps/node_modules/@types/jasmine'),
   '@types/node': resolveNpmTreeArtifact('ngdeps/node_modules/@types/node'),