Add comprehensive SNAP utility allowance data (FY2019-FY2026, sub-regions, household size) #20844

Job	Run time
Lint	19s
Full Suite - Baseline (excl States) & Reform & Python	5m 42s
Full Suite - Structural (States)	5m 41s
Full Suite - Structural (Other)	5m 42s
Full Suite - Baseline States	5m 41s
Check changelog fragment	7s
Quick Feedback (Selective Tests + Coverage)	3m 8s
	26m 20s

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