Rust

remove key-value stores for scheduler persistence #46

Job	Run time
Test on windows-latest Rust stable	7m 2s
Test on macos-latest Rust stable	2m 32s
Lint	19s
React build	1m 18s
Build Libraries on AMD64 Rust stable	11m 49s
Test Ballista on AMD64 Rust stable	4m 27s
Clippy (amd64, stable)	2m 36s
Check Cargo.toml formatting (amd64, stable)	1m 12s
Docker	22s
Test Workspace on AMD64 Rust stable	6m 33s
verify benchmark results (amd64) (amd64, stable)	8m 17s
	46m 27s

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