Support output value in AttributeSetter

[SodaDev]

Reasoning:
Add AttributeBuilder, which will extend the AttributeSetter contract with output value. Thanks to that, users can instrument attributes based on the AWS SDK responses.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: SodaDev / name: Marcin Sodkiewicz (6e05dfc, a070f2c, e52091b, 9309250, d37aea5, ab694b3, 0c813a2)
• ✅ login: pellared / name: Robert Pająk (734d659, fa17b57, 1398525, 231e92b)

[dmathieu]

This will need a changelog entry.

[codecov]

Codecov Report

Attention: Patch coverage is 88.88889% with 3 lines in your changes missing coverage. Please review.

Project coverage is 73.0%. Comparing base (7d7606c) to head (fa17b57).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...github.com/aws/aws-sdk-go-v2/otelaws/attributes.go	66.6%	1 Missing ⚠️
...hub.com/aws/aws-sdk-go-v2/otelaws/snsattributes.go	50.0%	1 Missing ⚠️
...hub.com/aws/aws-sdk-go-v2/otelaws/sqsattributes.go	50.0%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #6543   +/-   ##
=====================================
  Coverage   73.0%   73.0%           
=====================================
  Files        189     189           
  Lines      15754   15773   +19     
=====================================
+ Hits       11503   11519   +16     
- Misses      3916    3920    +4     
+ Partials     335     334    -1     

Files with missing lines	Coverage Δ
...tation/github.com/aws/aws-sdk-go-v2/otelaws/aws.go	95.8% <100.0%> (+0.1%)	⬆️
...ion/github.com/aws/aws-sdk-go-v2/otelaws/config.go	100.0% <100.0%> (ø)
...om/aws/aws-sdk-go-v2/otelaws/dynamodbattributes.go	100.0% <100.0%> (ø)
...github.com/aws/aws-sdk-go-v2/otelaws/attributes.go	89.4% <66.6%> (+7.1%)	⬆️
...hub.com/aws/aws-sdk-go-v2/otelaws/snsattributes.go	81.4% <50.0%> (-6.6%)	⬇️
...hub.com/aws/aws-sdk-go-v2/otelaws/sqsattributes.go	94.4% <50.0%> (-5.6%)	⬇️

[SodaDev]

@dmathieu @akats7 I will never merge that PR. Every time I resolve conflicts, checks are blocked and have to be approved, and after they are approved, there is a new merge to the main, and again, I can't merge it because of a conflict. Could you help me?

Could you merge it after the checks pass? I am not getting any notifications after your approval; the checks are green.

[dmathieu]

Ping @open-telemetry/go-approvers for second review.

[pellared]

Please sync with main and address the comment.

I plan to approve and merge this on Friday given all comments are addressed.

[pellared]

Planning to merge this on Friday.

@SodaDev, thank you for your contribution 🏅

[pellared]

@dmathieu, can you make a double-check and merge?

[pellared]

@SodaDev, thank you for your contribution 🏅