refactor: convert utils & validations from enzyme to RTL #15439

Job	Run time
Lint	2m 39s
Test with Node 18 (1, 4)	2m 34s
Test with Node 18 (2, 4)	2m 5s
Test with Node 18 (3, 4)	2m 24s
Test with Node 18 (4, 4)	1m 31s
Test with Node 20 (1, 4)	2m 31s
Test with Node 20 (2, 4)	2m 5s
Test with Node 20 (3, 4)	2m 7s
Test with Node 20 (4, 4)	1m 38s
Get global coverage thresholds	3s
Check global coverage with Node 18	41s
Check global coverage with Node 20	27s
	20m 45s

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