Fix #1519, Refactor `CFE_TBL_SearchCmdHndlrTbl` to simplify and unmix variables #1846

Job	Run time
checks-for-duplicates	3s
Custom checkout and cache for cFS documents	8s
Build Mission Doc / checks-for-duplicates	5s
Build and deploy cFE Docs / checks-for-duplicates	5s
Build Mission Doc / Build Documentation (mission-doc)	1m 19s
Build and deploy cFE Docs / Build Documentation (cfe-usersguide)	20s
Deploy documentation to gh-pages	0s
	2m 0s

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