Backport master <-> experimental search features#5201

Closed

fschade wants to merge 4 commits intoexperimentalfrom experimental-master-search-union

+893-1,397

Commits on Dec 7, 2022

rename provider to searchService
fschade
committed

Commits on Dec 8, 2022

add more engine tests
fschade
committed

Commits on Dec 9, 2022

remove experimental query lexer and parser
fschade
committed

Commits on Dec 12, 2022

fix codacy issues
fschade
committed