Fix a few bugs related to compile tests

The failure would happen when the main project was configured with
a compiler which is not the system default. The new configuration
was not forwarded to "ctest --build-and-test". This fixes it.

FMT_STATIC_ASSERT is defined in posix.h so expect_compile_error was
actually failing on a missing macro instead of the static assert.

The cache bug meant that a failed test would appear forever broken,
even if the proper fix was applied.

Fix user-defined literal detection for Intel C++ compiler (#311)

Fix typos