chore(grpc): Remove transaction-based tracing

[alexander-alderman-webb]

Description

Closes #7092

Issues

Reminders

• Please add tests to validate your changes, and lint your code using uv run ruff.
• Add GH Issue ID & Linear ID (if applicable)
• PR title should use conventional commit style (feat:, fix:, ref:, meta:)
• For external contributors: CONTRIBUTING.md, Sentry SDK development docs, Discord community

[github-actions]

Codecov Results 📊

✅ 106322 passed | ⏭️ 5464 skipped | Total: 111786 | Pass Rate: 95.11% | Execution Time: 379m 3s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📈 +6385
Passed Tests	📈 +7400
Failed Tests	—
Skipped Tests	📉 -1015

All tests are passing successfully.

✅ Patch coverage is 80.95%. Project has 2296 uncovered lines.
✅ Project coverage is 90.38%. Comparing base (base) to head (head).

Files with missing lines (2)

File	Patch %	Lines
sentry_sdk/integrations/grpc/client.py	86.67%	⚠️ 2 Missing and 1 partials
sentry_sdk/integrations/grpc/server.py	66.67%	⚠️ 2 Missing

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
+ Coverage    90.23%    90.38%    +0.15%
==========================================
  Files          193       185        -8
  Lines        25423     23869     -1554
  Branches      9336      8792      -544
==========================================
+ Hits         22940     21573     -1367
- Misses        2483      2296      -187
- Partials      1437      1388       -49

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