Replace GlobalReport with per device wgt::Report that works via Tracing

[sagudev]

Connections
For #9950 and towards #5121

Description
In #9950 I discovered that we need GlobalReport for some memory leak tests. One option is to completely remove all such uses and tests (I wonder how useful they are anyway). This PR goes into alternative route by impl reporting as part of tracing (which gives us most of Creates/Drops). Tracing is per device not per instance, so some stuff is unimplementable (so is removed from test), some stuff are not traced yet so they are commented out. Still I think the most important part of mem leak test was kept.

Testing
Covered by tests.

Squash or Rebase?
Squash

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.

[sagudev]

Rebased and resolved conflicts!