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>