fix(bazel): ensure terser knows about input sourcemap to trace-back
fix(bazel): ensure terser knows about input sourcemap to trace-back

Currently Terser does not know about the potential ESBuild
transformation, resulting in a rather non-helpful map. We need to make
sure Terser has access to the ESBuild map outputs so that it can
trace-back and resolve the chain of mappings.

angular/dev-infra,angular/dev-infra,angular/dev-infra,angular/dev-infra