* cleanup: refactor MapStringStringSliceValueSet to be cleaner

* cleanup: replace SliceStringToSet with actual set

* cleanup: replace SliceStringSubset with real set

* cleanup: replace SliceStringContains with slices.Contains

* cleanup: remove unused function SliceStringHasPrefix

* cleanup: fixup StringHasPrefixInSlice doc string

* cleanup: refactor SliceSetDisjoint to use real set

* cleanup: replace CompareSliceSetString with SliceSetEq

* cleanup: replace CompareMapStringString with maps.Equal

* cleanup: replace CopyMapStringString with CopyMap

* cleanup: replace CopyMapStringInterface with CopyMap

* cleanup: fixup more CopyMapStringString and CopyMapStringInt

* cleanup: replace CopySliceString with slices.Clone

* cleanup: remove unused CopySliceInt

* cleanup: refactor CopyMapStringSliceString to be generic as CopyMapOfSlice

* cleanup: replace CopyMap with maps.Clone

* cleanup: run go mod tidy