fix(opentelemetry-instrumentation-aws-sdk)!: rename aws.region to cloud.region

[yuliia-fryshko]

Fixes #2841

Which problem is this PR solving?

• This PR updates the AWS SDK instrumentation to align with the latest semantic conventions, which introduced generic and standardized cloud.region instead of vendor specific aws.region.

Short description of the changes

• Replaced all usage of aws.region with cloud.region.
• This change affects instrumentation for AWS SDK including Bedrock and S3.

Notes

• This is a breaking change for users relying on the presence of the aws.region attribute.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: yuliia-fryshko / name: Yuliia Fryshko (dc9663c)
• ✅ login: david-luna / name: David Luna (a7c54fb)

[trentm]

LGTM. I updated the PR title (following conventional commits) to indicate that this is a breaking change. That's necessary to ensure the next version is 0.54.0 rather than 0.53.1.

Code owners: any strong opinions here?

[trentm]

cloud.region does have a constant in @opentelemetry/semantic-conventions. However, we can defer using that constant (and the others in this instrumentation) to #2377

The current constant using the old, deprecated naming (SEMRESATTRS_CLOUD_REGION) is/was intended for use as a Resource attribute. That was before open-telemetry/semantic-conventions#2238 expanded the use of cloud.region beyond resource attributes. That's why I'm not suggesting this PR use SEMRESATTRS_CLOUD_REGION.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.66%. Comparing base (33337d4) to head (a7c54fb).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2842      +/-   ##
==========================================
+ Coverage   89.65%   89.66%   +0.01%     
==========================================
  Files         185      185              
  Lines        9034     9034              
  Branches     1852     1852              
==========================================
+ Hits         8099     8100       +1     
+ Misses        935      934       -1     

Files with missing lines	Coverage Δ
...entelemetry-instrumentation-aws-sdk/src/aws-sdk.ts	92.94% <100.00%> (ø)
...opentelemetry-instrumentation-aws-sdk/src/enums.ts	100.00% <100.00%> (ø)
...opentelemetry-instrumentation-aws-sdk/src/utils.ts	92.85% <ø> (ø)

... and 1 file with indirect coverage changes

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[pichlermarc]

Code owners: any strong opinions here?

cc @jj22ee @trivikr (component owners)

[jj22ee]

LGTM, no strong opinions from me.