refactor(sdk-metrics): replace MetricsAttributes with Attributes

[david-luna]

Which problem is this PR solving?

Replaces MetricsAttributes with Attributes

Refs #4175

Short description of the changes

Replace the interfaces in sources & tests.

How Has This Been Tested?

at the root folder

• npm run compile
• npm run test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.92%. Comparing base (f8ab559) to head (fa06e47).
Report is 21 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5021      +/-   ##
==========================================
+ Coverage   93.39%   93.92%   +0.53%     
==========================================
  Files          46      310     +264     
  Lines         712     8138    +7426     
  Branches      120     1633    +1513     
==========================================
+ Hits          665     7644    +6979     
- Misses         47      494     +447     

Files with missing lines	Coverage Δ
packages/sdk-metrics/src/Instruments.ts	96.00% <100.00%> (ø)
packages/sdk-metrics/src/ObservableResult.ts	100.00% <100.00%> (ø)
packages/sdk-metrics/src/aggregator/types.ts	100.00% <ø> (ø)
...xemplar/AlignedHistogramBucketExemplarReservoir.ts	92.30% <ø> (ø)
...metrics/src/exemplar/AlwaysSampleExemplarFilter.ts	100.00% <ø> (ø)
...ages/sdk-metrics/src/exemplar/ExemplarReservoir.ts	95.65% <100.00%> (ø)
...-metrics/src/exemplar/NeverSampleExemplarFilter.ts	100.00% <ø> (ø)
...s/src/exemplar/SimpleFixedSizeExemplarReservoir.ts	77.77% <ø> (ø)
...dk-metrics/src/exemplar/WithTraceExemplarFilter.ts	100.00% <ø> (ø)
packages/sdk-metrics/src/export/MetricData.ts	100.00% <ø> (ø)
... and 5 more

... and 251 files with indirect coverage changes

[pichlermarc]

thanks 🙂