Replaces static mutable references in metrics counter (#4408) #16273

Job	Run time
cargo-test-sbf (associated-token-account)	3m 14s
check (associated-token-account)	3m 12s
cargo-test-sbf (feature-proposal)	3m 15s
test_cli (single-pool)	3m 15s
check (feature-proposal)	3m 10s
cargo-test-sbf (instruction-padding)	3m 13s
test_cli (token-2022)	3m 13s
check (instruction-padding)	3m 11s
check (memo)	3m 8s
check (record)	3m 11s
cargo-test-sbf (memo)	3m 12s
check (single-pool)	3m 11s
check (slashing)	3m 12s
cargo-test-sbf (record)	3m 12s
check (stake-pool)	3m 12s
cargo-test-sbf (single-pool)	3m 8s
check (token-2022)	3m 11s
cargo-test-sbf (slashing)	3m 13s
cargo-test-sbf (stake-pool)	3m 12s
cargo-test-sbf (token-2022)	3m 13s
	1h 3m 58s

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