Merge customizations for CloudWatch OTel enrichment

[gcacace]

Description of changes:

Add _xform_cache special case entries for the 3 CloudWatch OTel enrichment operations so that xform_name produces otel instead of o_tel / o-tel:

• GetOTelEnrichment → get_otel_enrichment / get-otel-enrichment
• StartOTelEnrichment → start_otel_enrichment / start-otel-enrichment
• StopOTelEnrichment → stop_otel_enrichment / stop-otel-enrichment

Without this fix, the camelCase OTel is incorrectly split into o_tel / o-tel. The correct form is otel, consistent with the OpenTelemetry (https://opentelemetry.io/) community convention.

This follows the same pattern as the SocialMessaging/WhatsApp customizations in 095b9cd.

Changes:

• botocore/init.py — Added 6 entries (3 operations × 2 separators) to _xform_cache
• tests/unit/test_utils.py — Added corresponding test assertions in test_special_cases

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.60%. Comparing base (ee748e4) to head (acc2870).
⚠️ Report is 139 commits behind head on develop.
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Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3676   +/-   ##
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  Coverage    92.59%   92.60%           
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  Files           68       68           
  Lines        15634    15685   +51     
========================================
+ Hits         14477    14525   +48     
- Misses        1157     1160    +3     

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