feat: Add Clone implementation to SdkLogger for consistency with SdkTracer

[Copilot]

This PR resolves an API inconsistency where SdkTracer implements Clone but SdkLogger does not, requiring users to wrap SdkLogger in Arc for cloning scenarios.

Changes Made

• Added Clone to the derive macro for SdkLogger struct
• Added a test to verify the clone functionality works correctly

Why This Change is Safe

Both SdkLogger and SdkTracer have identical structure:

• scope: InstrumentationScope (already implements Clone)
• provider: SdkLoggerProvider / SdkTracerProvider (both already implement Clone)

Since all fields already implement Clone, adding it to SdkLogger is a straightforward and safe change.

Example Usage

use opentelemetry_sdk::logs::SdkLoggerProvider;
use opentelemetry::logs::LoggerProvider;

let provider = SdkLoggerProvider::builder().build();
let logger = provider.logger("my-service");

// Before: This would fail to compile
// let cloned_logger = logger.clone(); // ❌ 

// After: This now works consistently with SdkTracer
let cloned_logger = logger.clone(); // ✅

This makes the logging and tracing APIs consistent and reduces the need for Arc wrappers when cloning is required.

Fixes #3058.

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[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: lalitb / name: Lalit Kumar Bhasin (80057bf)
• ✅ login: cijothomas / name: Cijo Thomas (24f2c99)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.1%. Comparing base (0631070) to head (80057bf).

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #3059     +/-   ##
=======================================
- Coverage   80.2%   80.1%   -0.1%     
=======================================
  Files        126     126             
  Lines      21949   21949             
=======================================
- Hits       17604   17603      -1     
- Misses      4345    4346      +1     

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[cijothomas]

@copilot run cargo fmt and other lint tools

[Copilot]

@copilot run cargo fmt and other lint tools

I've successfully run cargo fmt and clippy on the changes. The formatting was applied and I fixed a clippy warning in the test by replacing assert!(true) with a meaningful assertion. All linting passes now. Changes committed in 4c9072f.

[cijothomas]

Oops! Pushed to wrong branch.