chore: remove config from BasicTracerProvider#getTracer

[Flarna]

Api doesn't allow to pass a tracer config to getTracer.
Also ProxyTracer and ProxyTracerProvider don't forward config.

It seems it's better to remove this option from BasicTracerProvider to avoid confusions.

[codecov]

Codecov Report

Merging #1908 (4c72a91) into main (70a128f) will decrease coverage by 0.33%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1908      +/-   ##
==========================================
- Coverage   92.77%   92.43%   -0.34%     
==========================================
  Files         172      155      -17     
  Lines        5966     5037     -929     
  Branches     1269     1071     -198     
==========================================
- Hits         5535     4656     -879     
+ Misses        431      381      -50     

Impacted Files	Coverage Δ
...s/opentelemetry-tracing/src/BasicTracerProvider.ts	79.48% <100.00%> (-0.52%)	⬇️
...kages/opentelemetry-web/src/StackContextManager.ts
...mentation-xml-http-request/src/enums/EventNames.ts
...emetry-instrumentation-xml-http-request/src/xhr.ts
...s/opentelemetry-instrumentation-fetch/src/fetch.ts
packages/opentelemetry-web/src/utils.ts
packages/opentelemetry-web/src/types.ts
...kages/opentelemetry-exporter-collector/src/util.ts
...rumentation/src/platform/browser/old/autoLoader.ts
...-instrumentation-fetch/src/enums/AttributeNames.ts
... and 9 more