Search refactoring to better utilize index and improve capabilities #3043

Job	Run time
Build frontend unit test image	1m 4s
Build frontend e2e test image	3m 13s
Build backend e2e test image	1m 46s
lint_core	12s
Lint mwdb-core web sources	47s
Build mwdb-core core image	3m 19s
Build mwdb-core web image	40s
Perform frontend unit tests	31s
Perform backend e2e tests	4m 34s
Perform frontend e2e tests	3m 33s
Push test images on Docker Hub	0s
Push images on Docker Hub	0s
	19m 39s

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