fix(testloop): set epoch length in testloop #9104

Job	Run time
Cargo Deny	30s
Cargo Audit	23s
Cargo Nextest (Linux)	10m 33s
Cargo Clippy	8m 51s
Cargo Nextest (Linux Nightly)	12m 56s
Cargo Fmt	26s
Non-default Configuration Builds	1m 18s
Themis	41s
Unused Dependencies	7m 2s
Rust Doctests	11m 53s
Protobuf Backward Compatibility	10s
Protocol Schema	13m 17s
Cargo check publishable packages separately (Linux, linux, ubuntu-latest)	7m 37s
Backward Compatibility	11m 8s
Cargo check publishable packages separately (Windows, win, windows-latest)	2m 8s
Database Migration	11m 42s
Genesis Changes	10m 2s
Sanity Checks	6m 29s
Upgradability	11m 32s
Style	36s
Generate Coverage Artifact (unit, unit)	2m 38s
Upload Coverage	16s
	2h 12m 8s

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