Move Spring upgrade to a different module

Description:

• Added core-lib-azure-spring6 module compatible with spring 6.
• Migrated to jakarta from javax in spring6 module.

Changes include:

• Refactor (a non-breaking change that improves code maintainability).
• Bugfix (a non-breaking change that solves an issue).
• New feature (a non-breaking change that adds functionality).
• Breaking change (a change that is not backward-compatible and/or changes current functionality).