RDK-43786: Implement Thunder Plugin Configuration for CMake-3.20 & above

Reason for change: Added the Cobalt-plugin.conf.in for modern config generator
Test Procedure: Verify in Jenkin Build
Risks: High
Change-Id: I6c09a7ef96341469b271c3518df865764af574cc
Signed-off-by: Thamim  Razith <tabbas651@cable.comcast.com>
(cherry picked from commit 0eb3f9d3e5012b3696e2965c0cf5c6f7c1fc8da5)
(cherry picked from commit d7c6f6a8e7c33ee1f794efa8ac9310ca17f450d8)