backoff version checking in exporter.py

[Annosha]

Fixes #3006

Description

This PR improves the OTLPExporterMixin class by adding detailed version-checking logic to handle different versions of the backoff library. This prevents potential issues with unsupported versions and enhances error handling when the backoff package is missing or incompatible.

In this PR I've tried to:

• Imported Version and InvalidVersion from the packaging.version module to parse the backoff library version using semantic versioning.
• Added _check_backoff_version to verify if the backoff package is installed, check its version, and ensure it meets minimum compatibility requirements.
• Conditional Logging Based on Version Check

Note: If these changes are approved, I will proceed with implementing version checking in other relevant areas.

Fixes # 3006

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

tox -e opentelemetry-api
tox -e opentelemetry-sdk
tox -e ruff

Checklist:

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated

[lzchen]

Do we really need to use these classes?

[lzchen]

@Annosha

See this comment

[Annosha]

Closing this PR since the issue isn't relevant any more.