feat: account serialization overhaul #9633

Job	Run time
Backward Compatibility	11m 21s
Protobuf Backward Compatibility	11s
Genesis Changes	9m 55s
Sanity Checks	6m 41s
Database Migration	11m 26s
Cargo Clippy	8m 38s
Cargo Fmt	21s
Rust Doctests	10m 55s
Protocol Schema	13m 34s
Style	34s
Upgradability	11m 47s
spellcheck	27s
Cargo Audit	23s
Cargo Nextest (Linux)	13m 9s
Cargo Deny	31s
Cargo Nextest (Linux Nightly)	13m 16s
Non-default Configuration Builds	1m 18s
Themis	41s
Unused Dependencies	7m 9s
Cargo check publishable packages separately (Linux, linux, ubuntu-latest)	9m 15s
Cargo check publishable packages separately (Windows, win, windows-latest)	2m 32s
Generate Coverage Artifact (unit, unit)	3m 0s
Upload Coverage	9s
	2h 17m 13s

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