fix: Applied Dispose Pattern to Prevent Resource Leaks

[chiomalovet]

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Fixes
Closes (#5140)

Design Discussion Issue
This pull request addresses the design discussion in # regarding the use of the dispose pattern for proper resource management in the codebase.

Changes
The following changes were made:

Implemented Dispose Pattern: Applied the dispose pattern to ensure proper cleanup of resources. The tracerProvider.Dispose() is now explicitly called to flush spans and shut down the tracing pipeline, avoiding resource leaks.
Removed Implicit Disposal: Eliminated the pattern of "using var" for meterProvider in favor of explicitly calling Dispose(). This resolves the potential issue where helper methods could inadvertently cause premature disposal of the provider.
Ensured Consistency: The changes align with best practices for resource management in .NET and provide clarity to future contributors copying code patterns.
Merge Requirement Checklist:
CONTRIBUTING Guidelines Followed: License requirements met, static analysis tools were run, and nullability is enabled where appropriate.
Unit Tests Added/Updated: Relevant tests were reviewed and updated where necessary to ensure the changes function as expected.
CHANGELOG.md Updated: The CHANGELOG.md has been updated to reflect these non-trivial changes to resource management.
Changes in Public API Reviewed: No breaking changes were introduced to the public API. The dispose pattern change does not affect the external API contract but ensures better internal resource management.

[linux-foundation-easycla]

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[reyang]

This looks like a spam PR from bots.