fix(detector-aws): replace ecs deprecated semconv consts and hardcoded strings

[garysassano]

Which problem is this PR solving?

• Updates AWS ECS detector tests to use proper semantic convention constants instead of deprecated ones
• Removes redundant semantic resource attributes file by using constants from semconv

Short description of the changes

• Replaced deprecated SEMRESATTRS_* and CLOUDPROVIDERVALUES_* constants with their ATTR_* and *_VALUE_* counterparts from semconv following unstable semconv best practices
• Removed SemanticResourceAttributes.ts file as ATTR_CLOUD_RESOURCE_ID is now properly imported from /src/semconv.ts
• Organized imports alphabetically for better readability

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.95%. Comparing base (4f1e605) to head (d95a63f).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2674      +/-   ##
==========================================
- Coverage   90.96%   90.95%   -0.02%     
==========================================
  Files         172      171       -1     
  Lines        8137     8136       -1     
  Branches     1649     1649              
==========================================
- Hits         7402     7400       -2     
- Misses        735      736       +1     

Files with missing lines	Coverage Δ
...ource-detector-aws/src/detectors/AwsEcsDetector.ts	100.00% <ø> (ø)
...e-detector-aws/src/detectors/AwsEcsDetectorSync.ts	97.08% <ø> (-0.03%)	⬇️
...opentelemetry-resource-detector-aws/src/semconv.ts	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes