Refactor flat-table and flat-table-row to RTL FE-6592 #15433

Job	Run time
Lint	2m 45s
Test with Node 18 (1, 4)	2m 30s
Test with Node 18 (2, 4)	2m 18s
Test with Node 18 (3, 4)	2m 19s
Test with Node 18 (4, 4)	1m 20s
Test with Node 20 (1, 4)	2m 23s
Test with Node 20 (2, 4)	1m 42s
Test with Node 20 (3, 4)	2m 6s
Test with Node 20 (4, 4)	1m 12s
Get global coverage thresholds	4s
Check global coverage with Node 18	40s
Check global coverage with Node 20	28s
	19m 47s

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