[CONFIGURATION] Apply general attribute_limits to tracer and logger providers

[ayush-singh-0601]

Fixes #4467

The YAML parser already accepted attribute_limits, but SdkBuilder logged a warning and ignored them. Per the spec, general attribute limits should apply when tracer/logger limits are not set, and model-specific limits should win when they are.

Changes

• Pass attribute_limits from CreateConfiguredSdk into CreateTracerProvider and CreateLoggerProvider.
• If a provider has no limits, copy attribute_count_limit and attribute_value_length_limit from the general config into SpanLimits / LogRecordLimits.
• If a provider does have limits, keep using those values (including span-only fields such as event/link limits).
• Existing two-argument CreateTracerProvider / CreateLoggerProvider overloads are unchanged; a three-argument overload takes the general limits so the previous ABI is preserved.
• Unit tests cover general limits, provider override, and CreateConfiguredSdk wiring for both traces and logs.

How changes were tested

• Added SdkBuilder.SpanLimitsFromAttributeLimits and SdkBuilder.SpanLimitsOverrideAttributeLimits.
• Added programmatic tests that emit log records through a recording exporter and that read GetSpanLimits() on the configured tracer provider.

I could not run the C++ test binaries in this environment (no local CMake/Bazel build of opentelemetry-cpp). CI should run sdk_builder_test and programmatic_configuration_test.

• CHANGELOG.md updated for non-trivial changes
• Unit tests have been added
• Changes in public API reviewed

[codecov]

Codecov Report

❌ Patch coverage is 92.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.64%. Comparing base (68a575f) to head (c82730a).

Files with missing lines	Patch %	Lines
sdk/src/configuration/sdk_builder.cc	92.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4468      +/-   ##
==========================================
+ Coverage   82.62%   82.64%   +0.02%     
==========================================
  Files         512      512              
  Lines       20139    20160      +21     
==========================================
+ Hits        16638    16659      +21     
  Misses       3501     3501              

Files with missing lines	Coverage Δ
...lude/opentelemetry/sdk/configuration/sdk_builder.h	100.00% <ø> (ø)
sdk/src/configuration/sdk_builder.cc	61.64% <92.00%> (+0.54%)	⬆️

... and 1 file with indirect coverage changes

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