Support Ubuntu 20.04, 22.04, Fedora 35 in build_oai, additional fixes, drop old distros

Ubuntu 20.04 compilation support added in buil-oai Compilation flag updated for native architecture

Signed-off-by: Manish Manish1.Kumar@amd.com

Robert Schmidt:

• some cleanup
• drop Ubuntu 14.04, 17.04, and 17.10 (16.04 is still used in the CI)
• protobuf is installed from repo if available
• add support for Fedora 35
• add support for Ubuntu 22
• fix issue #539 (closed)