Replace grunt with make (#1735)

* WIP esbuild background

* Rest of the bundles and sass

* Browserify the background

* Add remaining copy tasks

* Autofill copy

* Content scope scripts

* Test moving new flow into place

* Fix mv3 locales

* Prevent test on install-ci step

* debug

* Bundle surrogates.txt

* integration tests

* Fix mv3 build

* Migrate unit-tests (mostly)

Having some issues with reference test imports.

* Comments and tidy

* Add content-scope-messaging

* Remove grunt

* Use browserify for everything

* Cleanup unneeded npm scripts

* WIP fix unit-tests

* Provide all needed options to unit-test build

* Use find to match build dependencies

* Parallelize builds

* Readd file map transform

* Setup watch builds

* Clean comments

* Remove reference-tests copy step.

* Use attribution test cases from node_modules

* Tidy up build script

* Use sync fs

* Revert import changes