feat(resharding): introduce resharding actor #7264

Job	Run time
Protobuf Backward Compatibility	10s
Cargo Nextest (Linux)	15m 23s
Cargo Nextest (Linux Nightly)	15m 23s
Backward Compatibility	10m 57s
Cargo Nextest (MacOS)	12m 2s
Cargo Clippy	8m 34s
Cargo Fmt	22s
Lychee Lints	8s
Protocol Schema	14m 13s
Database Migration	11m 23s
Genesis Changes	9m 46s
Sanity Checks	6m 6s
Style	35s
Upgradability	11m 34s
Cargo Audit	18s
Cargo Deny	31s
Non-default Configuration Builds	1m 16s
Themis	38s
Unused Dependencies	6m 53s
Rust Doctests	11m 22s
Windows check for building public libraries	3m 43s
Upload Coverage	24s
Generate Coverage Artifact (unit, unit)	2m 5s
Generate Coverage Artifact (integration, unit integration)	2m 36s
	2h 26m 22s

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