As reported in the BUG #22524, mismatched parenthesis reported differently
for `while()` and `if()`.
The problem was in the double loop (over "handlers" and the arguments),
where the outer loop didn't check the result of the running handler.
Move failure cases from the CMake.{If,List,While,GetProperty} tests over
to the RunCMake.{if,list,while,get_property} tests to use the more
modern infrastructure. This also avoids using REGEX_ESCAPE_STRING to
try to regex-match full paths.