Testing Valueless PVL Keyword Issues (#5573)

* update Auto in .trn files

* update Optional in .trn files

* updated mission specific .trn files with Auto

* updated Debug in .trn files

* Account for valueless PVL keywords that are not reserved keywords

* Added dummy values for MappingGroupKeywords.pft

* Update all files that are weren't PVL compliant

* Fixed missing 'Debug' flag

* Missed a couple of test updates

* Addressed PR feeback

* Reverted if logic since keywordNameUpper is also const

* Added break when searching for reserved keyword

* reverted gtest

* Added changelog entries for PVL updates

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Co-authored-by: Amy Stamile <astamile@usgs.gov>