We use `bazel/esbuild` in various places (e.g. for app bundling tests).
These tests rely on the Angular Compiler-CLI itself for e.g. linking
or the Terser configuration. Since everything in this repo is now
strict ESM, the ESBuild configs (which are already ESM-supported)
need to import from `//packages/compiler-cli`. We also need to be
able to leverage our existing ESM Bazel loader for this though as
otherwise resolution would fail.
Long-term we can remove this if everything in the compiler-cli
would use `.mjs` extensions and the import paths would also specify
an explicit extension. See: https://nodejs.org/api/esm.html#mandatory-file-extensions
PR Close#48521
