feat(sdk-*)!: align merge resource behavior with spec

[david-luna]

Which problem is this PR solving?

Aligns SDKs resource merging strategy with the specification:

Fixes #5132

Short description of the changes

• remove config mergeResourcesWithDefault option
• do not merge default resource if one provided in config
• update tests

Type of change

Please delete options that are not relevant.

• Breaking change (fix or feature that would cause existing functionality to not work as expected)

How Has This Been Tested?

Compiled and ran the tests in all packages.

Checklist:

• Followed the style guidelines of this project
• Unit tests have been added

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.62%. Comparing base (8dc74e6) to head (229a559).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5219      +/-   ##
==========================================
- Coverage   94.63%   94.62%   -0.01%     
==========================================
  Files         323      323              
  Lines        8083     8068      -15     
  Branches     1643     1637       -6     
==========================================
- Hits         7649     7634      -15     
  Misses        434      434              

Files with missing lines	Coverage Δ
...imental/packages/opentelemetry-sdk-node/src/sdk.ts	96.93% <100.00%> (-0.04%)	⬇️
...perimental/packages/sdk-logs/src/LoggerProvider.ts	97.77% <100.00%> (-0.23%)	⬇️
experimental/packages/sdk-logs/src/config.ts	100.00% <ø> (ø)
...elemetry-sdk-trace-base/src/BasicTracerProvider.ts	96.19% <100.00%> (-0.08%)	⬇️
...ackages/opentelemetry-sdk-trace-base/src/config.ts	88.37% <ø> (ø)
packages/sdk-metrics/src/MeterProvider.ts	100.00% <100.00%> (ø)

[pichlermarc]

Looks good, thanks for working on this 🙌
Just one question about the NodeSDK implementation of this.

[pichlermarc]

just needs to be re-targeted to main and then we can merge :)

[david-luna]

just needs to be re-targeted to main and then we can merge :)

done!