Infrastructure support / fixes for making compiler server the default (#14279)
* Fix enabling the compiler server using autogen, and force it off if mcs is being used
* autogen updates
* Formatting fixes
* Fix vbcs getting turned on if unspecified even if mcs was selected
* Dynamically evaluate ENABLE_COMPILER_SERVER each time we compile instead of evaluating it once at some arbitrary point during makefile evaluation
* More detailed comment based on testing
* Handle the /shared option in genproj so it doesn't fail
* Raise basic profile check requirement to 6.2 and hopefully assert that named pipes work
* Default compiler server to off for now.