Remove racc gem from 3.3 and 3.4 appraisal files

[sarahchen6]

What does this PR do?
Remove racc gem from 3.3 and 3.4 appraisal files, since rmosolgo/graphql-ruby#4650 is resolved.

Motivation:
Update appraisal files.

Change log entry
No.

Additional Notes:
N/A

How to test the change?
Green CI.

[datadog-datadog-prod-us1]

Datadog Report

Branch report: sarahchen6/update-3.3-3.4-appraisal
Commit report: 2049745
Test service: dd-trace-rb

✅ 0 Failed, 22127 Passed, 1476 Skipped, 5m 43.91s Total Time

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-01-03 10:31:04

Comparing candidate commit 2049745 in PR branch sarahchen6/update-3.3-3.4-appraisal with baseline commit b1400d5 in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 31 metrics, 2 unstable metrics.

[ivoanjo]

👍 LGTM

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.75%. Comparing base (b1400d5) to head (2049745).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4251      +/-   ##
==========================================
- Coverage   97.76%   97.75%   -0.01%     
==========================================
  Files        1353     1353              
  Lines       82392    82393       +1     
  Branches     4224     4224              
==========================================
- Hits        80550    80546       -4     
- Misses       1842     1847       +5     

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