Implement cache for OAuth2 inbound authentication

[ldclakmal]

Purpose

This PR implement caches for OAuth2 inbound authentication and update the existing cache for JWT inbound authentication.

Fixes #19707

Check List

• Read the Contributing Guide
• Required Balo version update
• Updated Change Log
• Checked Tooling Support (#)
• Added necessary tests
  • Unit Tests
  • Spec Conformance Tests
  • Integration Tests
  • Ballerina By Example Tests
• Increased Test Coverage
• Added necessary documentation
  • API documentation
  • Module documentation in Module.md files
  • Ballerina By Examples

[codecov-io]

Codecov Report

Merging #19693 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #19693   +/-   ##
=======================================
  Coverage   15.21%   15.21%           
=======================================
  Files          50       50           
  Lines        1308     1308           
  Branches      199      199           
=======================================
  Hits          199      199           
  Misses       1096     1096           
  Partials       13       13

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