Minor fixes of CMake based configuration for portability. (#10512)

  - Remove unnecessary install of pdb file.

    - We do not need it. Plus the location specified for it was not correct.

  - Rename option to be more unique and descriptive.

    - PCRE -> METIS_GKLIB_PCRE

  - Use the pcre regex library for MSVC.

    - There is no system regex library for MSVC. Instead we should use the
      unofficial pcre port from vcpkg and tell Metis to use that for GKLib
      regex needs.