chore: lint on shadowing in non-test sources, fix a few of them

[johnbley]

Fixes #1882. As suggested, this is only a lint warning, not an error, due to some false positives. Additionally, since so
many spurious warnings were given for it blocks in tests, disable the rule for test sources.

[codecov]

Codecov Report

Merging #1922 (22e5f7c) into main (16c941d) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1922      +/-   ##
==========================================
+ Coverage   92.74%   92.75%   +0.01%     
==========================================
  Files         174      177       +3     
  Lines        6108     6200      +92     
  Branches     1265     1291      +26     
==========================================
+ Hits         5665     5751      +86     
- Misses        443      449       +6     

Impacted Files	Coverage Δ
...emetry-core/src/baggage/propagation/HttpBaggage.ts	98.21% <100.00%> (ø)
...ges/opentelemetry-instrumentation-http/src/http.ts	95.51% <100.00%> (+0.81%)	⬆️
packages/opentelemetry-metrics/src/Meter.ts	88.59% <100.00%> (ø)
packages/opentelemetry-plugin-http/src/http.ts	97.31% <100.00%> (ø)
...emetry-core/src/platform/node/RandomIdGenerator.ts	87.50% <0.00%> (-6.25%)	⬇️
...s/opentelemetry-instrumentation-fetch/src/fetch.ts
...-instrumentation-fetch/src/enums/AttributeNames.ts
...ntelemetry-web/src/enums/PerformanceTimingNames.ts	100.00% <0.00%> (ø)
...kages/opentelemetry-web/src/StackContextManager.ts	97.05% <0.00%> (ø)
packages/opentelemetry-web/src/utils.ts	94.66% <0.00%> (ø)
... and 4 more

[obecny]

lgtm, just one suggestion hope you can address it before merging

[obecny]

@johnbley can you please resolve conflicts ?