hash-cache-tool: Refactors width calculation #8798

Job	Run time
cargo-test-sbf (token/program)	8m 55s
check	3m 34s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	13m 45s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	19m 15s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	8m 52s
test (single-pool/cli, single-pool/program)	21m 3s
cargo-test-sbf (token-upgrade/program)	8m 58s
test (token-upgrade/cli, token-upgrade/program)	17m 43s
cargo-test-sbf (feature-proposal/program)	8m 29s
cargo-test-sbf (governance/addin-mock/program, governance/program)	14m 24s
cargo-test-sbf (memo/program)	9m 32s
cargo-test-sbf (name-service/program)	9m 57s
cargo-test-sbf (stake-pool/program)	13m 9s
cargo-test-sbf (single-pool/program)	11m 13s
	2h 48m 49s

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