The change included in #3418 [1] should be backported to 1.3 along with anything critical path for this change. Being that there are significant architectural changes between the the 2.x codebase and 1.x best effort should be used to get as many tests and features as possible.

• [1] Add early rejection from RestHandler for unauthorized requests #3418

Exit Criteria

• Backport Allow customization of netty channel handles before and during decompression OpenSearch#10261 into OpenSearch - 1.3 branch
  • Create backport
  • Merge [Backport 1.3] Allow customization of netty channel handles before and during decompression (#10261) OpenSearch#11086
• Backport integration test framework into Security - 1.3 branch
  • Create backport
  • Merge [Backport 1.3] Minimum viable integration tests framework #3649
• Backport Expanding Authentication with SecurityRequest Abstraction #3430 into Security - 1.3 branch
  • Create backport
  • Merge [Backport 1.3] Expanding Authentication with SecurityRequest Abstraction (#3487) #3670
• Backport Add early rejection from RestHandler for unauthorized requests #3418 into Security - 1.3 branch
  • Create backport
  • Merge [Backport 1.3] Add early rejection from RestHandler for unauthorized requests (#3418) #3675