Forces use of either individual msgid config files or a symbolic link

[skliper]

Is your feature request related to a problem? Please describe.

ci_lab/arch_build.cmake

Lines 22 to 27 in 2930b94

	foreach(CI_LAB_CFGFILE ${CI_LAB_PLATFORM_CONFIG_FILE_LIST})
	generate_config_includefile(
	FILE_NAME "${CI_LAB_CFGFILE}"
	FALLBACK_FILE "${CMAKE_CURRENT_LIST_DIR}/config/default_${CI_LAB_CFGFILE}"
	)
	endforeach()

Not clear why we can't consistently support an override w/ a custom file name such that MIDs can all be in one file without the extra clutter of a symbolic link.

Describe the solution you'd like
Something like nasa/LC#98, which came from SC:
https://github.com/nasa/SC/blob/ab3a9a03aee8fb9826077c0492f4b7698132c057/arch_build.cmake#L29-L40

Describe alternatives you've considered
None

Alternative
Consider writing a wrapper function so this can be consistently handled for configurations that lend themselves to management from one file (perfids, msgids).

Requester Info
Jacob Hageman - NASA/GSFC

[skliper]

@jphickey - thoughts?