Faster source map tracing (#2426)
* Store the sourcemap::SourceMap directly, instead of encoding it
* Implement GenerateSourceMap trait and use it to retrieve live maps
* Cleanup and comments!
* Update safety comment
* Rename var
* Update snapshots
* Update snapshots
* Fix tracing errors in SSR
SSR has access to `EcmascriptChunkVc`, not `EcmascriptChunkContentVc`. Client gets access only to `EcmascriptChunkContentVc`
* Fix source map sources on client
Because the JS is nested in dirs, the source needs to be an absolute path.
Co-authored-by: Jared Palmer <jared@jaredpalmer.com>
