Add experimental updateTracerConfigurations for dynamically updateable on/off instrumentation

[jackshirazi]

This enables dynamic config - it's all that is needed at the experimental level. For the complete solution it would be a TracerProvider.updateTracerConfigurations() interface method addition.

A usage example is https://github.com/elastic/elastic-otel-java/blob/main/custom/src/main/java/co/elastic/otel/config/DynamicInstrumentation.java

Essentially, the configuration is set with an updatable ScopeConfigurator (see below fragment), then that can be updated at any time with eg GlobalOpenTelemetry.getTracerProvider().updateTracerConfigurations()

  public void customize(AutoConfigurationCustomizer autoConfiguration) {
    autoConfiguration.addTracerProviderCustomizer(
        (providerBuilder, properties) -> {
          providerBuilder.setTracerConfigurator(
              UpdatableConfigurator.INSTANCE);
          return providerBuilder;
        });
  }

  public static class UpdatableConfigurator implements ScopeConfigurator<TracerConfig> {
    public static final UpdatableConfigurator INSTANCE = new UpdatableConfigurator();
    private final ConcurrentMap<String, TracerConfig> map = new ConcurrentHashMap<>();

    private UpdatableConfigurator() {}

    @Override
    public TracerConfig apply(InstrumentationScopeInfo scopeInfo) {
      return map.getOrDefault(scopeInfo.getName(), TracerConfig.defaultConfig());
    }

    public void put(InstrumentationScopeInfo scope, TracerConfig tracerConfig) {
      map.put(scope.getName(), tracerConfig);
    }
  }

I haven't added implementations for DefaultTracerProvider and ExtendedDefaultTracerProvider nor tests, because I feel this is fine for the experimental stage, but those could be added easily

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 15 lines in your changes missing coverage. Please review.

Project coverage is 90.24%. Comparing base (7d74ada) to head (6f68542).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...in/java/io/opentelemetry/sdk/OpenTelemetrySdk.java	0.00%	7 Missing ⚠️
.../io/opentelemetry/sdk/trace/SdkTracerProvider.java	0.00%	6 Missing ⚠️
...ain/java/io/opentelemetry/sdk/trace/SdkTracer.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #6899      +/-   ##
============================================
- Coverage     90.30%   90.24%   -0.06%     
- Complexity     6594     6595       +1     
============================================
  Files           729      729              
  Lines         19784    19799      +15     
  Branches       1945     1945              
============================================
+ Hits          17866    17868       +2     
- Misses         1325     1340      +15     
+ Partials        593      591       -2     

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