chore: extract FilterName to a const #21085

Job	Run time
Detect changes	9s
Split Solidity Tests	22s
Solidity cross-version 1/1	42s
Solidity v0.8 1/6	1m 57s
Solidity v0.8 2/6	13m 20s
Solidity Coverage cross-version 1/1	2m 23s
Solidity v0.8 3/6	3m 54s
Solidity Coverage v0.8 1/6	5m 55s
Solidity v0.8 4/6	3m 28s
Solidity Coverage v0.8 2/6	20m 37s
Solidity v0.8 5/6	11m 16s
Solidity Coverage v0.8 3/6	13m 22s
Solidity v0.8 6/6	4m 8s
Solidity Coverage v0.8 4/6	10m 41s
Solidity Coverage v0.8 5/6	11m 52s
Solidity Coverage v0.8 6/6	19m 19s
Solidity	8s
Solidity Coverage	28s
	2h 4m 1s

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