BUILD/CI: Add PR build modes (#11438)

* BUILD/CI: Add PR build modes

* BUILD/CI: Skip unusable Intel compiler builds

* BUILD/CI: Tune PR build mode matrix

* BUILD/CI: Move CMake example check to long mode

* BUILD/CI: Run ICC build only on CentOS7

* BUILD/CI: Run ICC and PGI only on CentOS7

* GTEST/UCT/IB: Initialize SRD test status values

* BUILD/CI: Disable gtest in minimal CUDA build

* BUILD/CI: Address PR build review comments

* BUILD/CI: Use plain CentOS7 for compiler build

* BUILD/CI: Set Jenkins build mode to short