Remove *Search gRPC methods and cleanup search #2150

Job	Run time
Pre-checks: Rust code Format	13s
nidx: Rust code Format	16s
Lint all helm charts	7s
Pre-checks: Clippy lint	1m 1s
Build node binaries	2m 12s
nidx: Clippy lint	30s
Build virtual environment	1m 58s
Check Licenses	1m 22s
nidx tests	2m 40s
Node Rust tests	2m 56s
Pre-checks: Python lint 3.9	8m 55s
check-migrations	19s
NucliaDB tests (pg, 0)	2m 35s
Pre-checks: Python lint	2m 39s
NucliaDB components tests (ingest)	57s
NucliaDB tests (pg, 1)	2m 24s
NucliaDB components tests (reader)	2m 24s
NucliaDB tests (pg, 2)	2m 15s
NucliaDB components tests (standalone)	1m 53s
Python packages tests (nucliadb_dataset)	33s
Pre-checks: Protos up-to-date	37s
NucliaDB components tests (train)	1m 19s
Python packages tests (nucliadb_models)	29s
NucliaDB components tests (writer)	1m 48s
Python packages tests (nucliadb_node_binding)	22s
Python packages tests (nucliadb_sdk)	53s
Python packages tests (nucliadb_telemetry)	53s
Python packages tests (nucliadb_utils)	1m 18s
NucliaDB search tests	4m 44s
Sidecar tests	1m 44s
CI passed	1s
Trigger deploy	0s
Trigger release	0s
	52m 17s

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