Remove channel concept (python side) #1464

Job	Run time
Lint all helm charts	7s
Pre-checks: Clippy lint	45s
Check Licenses	1m 27s
Pre-checks: Rust code Format	16s
Build node binaries	2m 25s
Build virtual environment	2m 3s
Node Rust tests	3m 23s
Pre-checks: Python lint	2m 18s
check-migrations	16s
NucliaDB components tests (ingest)	52s
NucliaDB tests (pg, 0)	2m 7s
NucliaDB components tests (reader)	2m 22s
NucliaDB tests (pg, 1)	2m 19s
Python packages tests (nucliadb_dataset)	28s
NucliaDB components tests (standalone)	1m 46s
Pre-checks: Protos up-to-date	35s
NucliaDB tests (pg, 2)	2m 46s
Python packages tests (nucliadb_models)	17s
NucliaDB components tests (train)	1m 2s
Python packages tests (nucliadb_node_binding)	10s
NucliaDB components tests (writer)	1m 48s
Python packages tests (nucliadb_sdk)	45s
Python packages tests (nucliadb_telemetry)	38s
Python packages tests (nucliadb_utils)	1m 12s
NucliaDB search tests	5m 16s
Sidecar tests	1m 23s
CI passed	1s
Trigger release	0s
Trigger deploy	0s
	38m 47s

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