ESBuild relies on the linker and we currently set up the ESM loader,
along with accidentally enabling the patched resolution loader. This
didn't cause any problems in sandbox, but outside of sandbox incorrect
ESBuild versions may be discovered because the loader looks at the
top-level `npm/` node modules before looking relative to e.g.
`@bazel/esbuild`
PR Close#48521
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