Add CustomDA proof validation interface #1960

Job	Run time
Contract tests	4m 19s
Test unit	1m 17s
4844 tests	9m 45s
Test e2e fee token with 6 decimals and pricer	11m 20s
Test e2e custom fee token	10m 18s
Test e2e	11m 20s
	48m 19s

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