Merge topic 'try_compile-cleanup'

e1d4984706 Tests: Add RunCMake.try_compile case covering empty value arguments
6a85813806 Tests: Add RunCMake.try_compile case covering list arguments with no values
7a5b1b6010 cmCoreTryCompile: Select source-file signature project/target names earlier
8b0ee799e4 cmCoreTryCompile: Compute src-file signature build directory earlier
e73c8eaff2 cmTry{Compile,Run}Command: Port away from legacy cmCommand
7ba3a3290f try_compile: Refactor positional arg parsing
31ee3cd49d try_compile: Fail earlier when bindir is not an absolute path

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !7513