add header include order checking to CI

[jacobmerson]

In PR #260 @hgangwar updates the header file handling to use FILE_SETS of type HEADER. His goal for that PR is to address the inconsistent header locations between installation and build modes. However, one additional advantage is that this allows us to ensure that all public headers do not depend on include order.

Once PR@260 is merged, this can simply be handled by adding -DCMAKE_VERIFY_INTERFACE_HEADER_SETS=TRUE to the build PCMS build configuration.