chore: update API to 0.18.0

[Flarna]

Update dependencies to @opentelemetry/api 0.18.0.

Removed dependencies to @opentelemetry/context-base because it has been included in api.

[codecov]

Codecov Report

Merging #1977 (d50809b) into main (8af4444) will decrease coverage by 0.36%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1977      +/-   ##
==========================================
- Coverage   92.92%   92.56%   -0.37%     
==========================================
  Files         152      135      -17     
  Lines        5922     4988     -934     
  Branches     1245     1045     -200     
==========================================
- Hits         5503     4617     -886     
+ Misses        419      371      -48     

Impacted Files	Coverage Δ
...sync-hooks/src/AbstractAsyncHooksContextManager.ts	96.87% <ø> (ø)
packages/opentelemetry-sdk-node/src/sdk.ts	76.47% <ø> (ø)
...ontext-async-hooks/src/AsyncHooksContextManager.ts	100.00% <100.00%> (ø)
...async-hooks/src/AsyncLocalStorageContextManager.ts	100.00% <100.00%> (ø)
...emetry-core/src/platform/node/RandomIdGenerator.ts	87.50% <0.00%> (-6.25%)	⬇️
...rumentation/src/platform/browser/old/autoLoader.ts
...ntelemetry-web/src/enums/PerformanceTimingNames.ts
...lemetry-exporter-collector/src/transformMetrics.ts
...ages/opentelemetry-exporter-collector/src/types.ts
...ackages/opentelemetry-web/src/WebTracerProvider.ts
... and 10 more