For multi configuration generators let AUTORCC generate
the rcc output for all configurations.  This is a workaround
for the incomplete `$<CONFIG>` support in the DEPENDS and OUTPUT
clauses of a custom_command/custom_target.  Since we can't depend
on the per-config rcc output file we somehow must ensure the successful
rcc build for one configuration doesn't shadow the need to rcc rebuild
for a second configuration.

Closes #18006