feat(boto3): align span names with OTel conventions

[pabloDeputter]

Description

Align span names with OTel conventions:

Span name MUST be of the format Service.Operation as per the AWS HTTP API, e.g., DynamoDB.GetItem, S3.ListBuckets. This is equivalent to concatenating rpc.service and rpc.method with . and consistent with the naming guidelines for RPC client spans.

So we use modeled ServiceID and operation for span names: aws.<hyphenized-service-id>.<Operation> to <ServiceID>.<Operation>; e.g. aws.s3.GetObject => S3.GetObject.

(to be merged into the major branch)

Issues

Resolves #7498

[github-actions]

Codecov Results 📊

✅ 58226 passed | ⏭️ 2727 skipped | Total: 60953 | Pass Rate: 95.53% | Execution Time: 163m 31s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📉 -74457
Passed Tests	📉 -70593
Failed Tests	📉 -1
Skipped Tests	📉 -3863

➖ Removed Tests (1)

View removed tests

• test_input_attributes_nonstreaming_chat[False-True-False-messages2-expected_system_instructions2-expected_input_messages2]
  • File: tests.integrations.mistral.test_mistral

All tests are passing successfully.

✅ Patch coverage is 100.00%. Project has 2056 uncovered lines.
❌ Project coverage is 90.15%. Comparing base (703493d) to head (ea40d98).

Coverage diff

@@            Coverage Diff             @@
##        master       #PR       +/-##
==========================================
- Coverage    90.37%    90.15%    -0.22%
==========================================
  Files          199       185       -14
  Lines        26526     20876     -5650
  Branches      9866      7260     -2606
==========================================
+ Hits         23971     18820     -5151
- Misses        2555      2056      -499
- Partials      1495      1206      -289

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[pabloDeputter]

convert to draft since last PR of stack didn't merge for some reason