chore: cleanup eslint

[pichlermarc]

Which problem is this PR solving?

eslint rules @typescript-eslint/no-shadow (for *.ts) and @typescript-eslint/no-floating-promises (for test/**/*.ts) were duplicated.

This PR removes the duplicated @typescript-eslint/no-shadow rule and uses the newer entry for @typescript-eslint/no-floating-promises.

[codecov]

Codecov Report

Merging #3209 (0a4ec46) into main (d4ab03f) will decrease coverage by 1.06%.
The diff coverage is n/a.

❗ Current head 0a4ec46 differs from pull request most recent head 2206135. Consider uploading reports for the commit 2206135 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3209      +/-   ##
==========================================
- Coverage   93.21%   92.15%   -1.07%     
==========================================
  Files         196       87     -109     
  Lines        6443     2497    -3946     
  Branches     1363      547     -816     
==========================================
- Hits         6006     2301    -3705     
+ Misses        437      196     -241     

Impacted Files	Coverage Δ
...s/opentelemetry-core/src/platform/node/sdk-info.ts	0.00% <0.00%> (-100.00%)	⬇️
...opentelemetry-core/src/platform/node/globalThis.ts	0.00% <0.00%> (-100.00%)	⬇️
...pentelemetry-core/src/platform/node/performance.ts	0.00% <0.00%> (-100.00%)	⬇️
...emetry-api-metrics/src/platform/node/globalThis.ts	0.00% <0.00%> (-100.00%)	⬇️
...lemetry-resources/src/detectors/ProcessDetector.ts	31.81% <0.00%> (-68.19%)	⬇️
...perimental/packages/otlp-exporter-base/src/util.ts	79.41% <0.00%> (-17.65%)	⬇️
...ckages/opentelemetry-exporter-zipkin/src/zipkin.ts	84.48% <0.00%> (-15.52%)	⬇️
...lemetry-resources/src/detectors/BrowserDetector.ts	93.33% <0.00%> (-6.67%)	⬇️
...ges/opentelemetry-sdk-metrics/src/state/HashMap.ts
...-trace-base/src/platform/node/RandomIdGenerator.ts
... and 107 more