Remove ms-rest-js stuff from build-common

[MRayermannMSFT]

Nothing is using ms-rest-js now. Remove any references to ms-rest-js from build-common. This should at least include:

• flag for adding ms-rest-js as an optional dependency in esbuild/webpack

This removal should result in a breaking change in build-common version number. After making this change please, update all packages using build-common to the new version.