[wgpu] Use Arced resources instead of Global

[sagudev]

Connections
Includes commits from #9956
Last step towards #5121

This PR completely removes generate_report and tests using to it. For alt approach there is #9952

Description
Minimal changes to make it compile. Cleanups are left for follow ups:

• we still pass CoreContext to some types because of handle_error (which does not use self really)
• we should implement interface directly on wgpu-core resources (this will wait for other follow up work noted in Remove IDs and Registries #5121)
• use iterators instead of collections where methods allow

Testing
Just refactor.

Squash or Rebase?
Rebase

Checklist

• I self-reviewed and fully understand this PR.
• WebGPU implementations built with wgpu may be affected behaviorally.
• Validation and feature gates are in place to confine behavioral changes.
• Tests demonstrate the validation and altered logic works.
• CHANGELOG.md entries for the user-facing effects of this change are present.
• The PR is minimal, and doesn't make sense to land as multiple PRs.
• Commits are logically scoped and individually reviewable.
• The PR description has enough context to understand the motivation and solution implemented.