feat(debuginfo): Extract srcsrv data from PDB for file mapping

[mujacica]

No description provided.

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against 6290cd3

[loewenheim]

The approach of implementing the remapping as a transformer is fundamentally sound, but I believe the better approach is to integrate it into PdbDebugSession directly. This is for a few reasons:

1. The transformer machinery is used in Symbolicator to incorporate information from supplementary files (BCSymbolMaps, il2cpp mapping files) into a symcache. These files are separate from the object file being converted to a symcache. By contrast, in this case, the information is already present in the object file itself.
2. Symbolicator doesn't know about different object file types—it relies on symbolic to convert any object file into a symcache. This information is available to Symbolicator in principle, i.e. it could pattern match on what kind of object file it's dealing with and extract the source server information from PDB objects.