feat(core)!: remove unused/obsolete functions and types

[pichlermarc]

Which problem is this PR solving?

Removing more unused functions and types from @opentelemetry/core. These were all intended to be only used internally, or were previously used but are now obsolete.

Refs #5172

Breaking changes

• (user-facing): VERSION was an internal constant that was unintentionally exported. It has been removed without replacement.
• (user-facing): isWrapped has been removed in favor of isWrapped from @opentelemetry/instrumentation
• (user-facing): ShimWrapped has been removed in favor of ShimWrapped from @opentelemetry/instrumentation
• (user-facing): hexToBase64 was a utility function that is not used by the SDK anymore. It has been removed without replacement.
• (user-facing): hexToBinary was a utility function that now internal to @opentelemetry/otlp-tranformer. It has been removed without replacement.
• (user-facing): baggageUtils.getKeyParis was an internal utility function that was unintentionally exported. It has been removed without replacement.
• (user-facing): baggageUtils.serializeKeyPairs was an internal utility function that was unintentionally exported. It has been removed without replacement.
• (user-facing): baggageUtils.parseKeyPairsIntoRecord, has been removed in favor of parseKeyPairsIntoRecord
• (user-facing): baggageUtils.parsePairKeyValue was an internal utility function that was unintentionally exported. It has been removed without replacement.
• (user-facing): TimeOriginLegacy has been removed without replacement.
• (user-facing): isAttributeKey was an internal utility function that was unintentionally exported. It has been removed without replacement.

Type of change

• Breaking change (fix or feature that would cause existing functionality to not work as expected)

How Has This Been Tested?

• Unit tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.77%. Comparing base (99091be) to head (a129711).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5444      +/-   ##
==========================================
- Coverage   94.79%   94.77%   -0.02%     
==========================================
  Files         310      308       -2     
  Lines        7974     7966       -8     
  Branches     1682     1678       -4     
==========================================
- Hits         7559     7550       -9     
- Misses        415      416       +1     

Files with missing lines	Coverage Δ
...e/src/configuration/otlp-http-env-configuration.ts	95.83% <100.00%> (ø)
...e/src/configuration/otlp-grpc-env-configuration.ts	100.00% <100.00%> (ø)
...kages/otlp-transformer/src/common/hex-to-binary.ts	92.85% <ø> (ø)
...ntal/packages/otlp-transformer/src/common/utils.ts	100.00% <100.00%> (ø)

[trentm]

@pichlermarc Trawling through opentelemetry-js-contrib.git I see some usages of isWrapped. No hits for any of the others removed here:

plugins/web/opentelemetry-plugin-react-load/src/BaseOpenTelemetryComponent.ts
18:import { isWrapped } from '@opentelemetry/core';

plugins/web/opentelemetry-plugin-react-load/test/BaseOpenTelemetryComponent.test.ts
23:import { isWrapped } from '@opentelemetry/core';

plugins/web/opentelemetry-instrumentation-user-interaction/test/userInteraction.nozone.test.ts
19:import { isWrapped } from '@opentelemetry/core';

[trentm]

LGTM, modulo possibly want to change how isWrapped is handled.

[trentm]

As I mentioned in a comment, this is used in one contrib package (plugin-react-load). So perhaps this falls under:

if an export is used in exactly one package - move its code to that package (do not export it from the package it was moved to)

It is used in tests in another package (opentelemetry-instrumentation-user-interaction), but that pkg also has a dep on @opentelemetry/instrumentation, so can use the isWrapped from there.