Fix dSYM generation when CHPL_LAUNCHER!=none

[jabraham17]

Fixes the generation of dSYM files when CHPL_LAUNCHER!=none.

This PR adjusts the generation and movement of dSYM files to more closely match the executable

• clangUtil generates the file
  • If no launcher, clangUtil moves the file
  • If launcher, clangUtil invokes a makefile to move the file

This PR also cleans up the code for dsym generation and fixes sub_test/sub_clean's handling of dSYM files

Tested as part of #27969

[Reviewed by @DanilaFe]