`form_with` with `validate: false` on Rails 8 exception fix #380

Job	Run time
Ruby Tests (3.1, rails_6.1, stable)	11s
Ruby Tests (3.1, rails_7.0, stable)	11s
Ruby Tests (3.1, rails_7.1, stable)	11s
Ruby Tests (3.1, rails_7.2, stable)	12s
Ruby Tests (3.2, rails_7.0, stable)	20s
Ruby Tests (3.2, rails_7.1, stable)	13s
Ruby Tests (3.2, rails_7.2, stable)	13s
Ruby Tests (3.2, rails_8.0, stable)	14s
Ruby Tests (3.3, rails_7.0, stable)	16s
Ruby Tests (3.3, rails_7.1, stable)	22s
Ruby Tests (3.3, rails_7.2, stable)	16s
Ruby Tests (3.3, rails_8.0, stable)	15s
Ruby Tests (3.4, rails_7.1, stable)	12s
Ruby Tests (3.4, rails_7.2, stable)	15s
Ruby Tests (3.4, rails_8.0, stable)	13s
Ruby Tests (3.2, rails_edge, experimental)	24s
Ruby Tests (3.3, rails_edge, experimental)	21s
Ruby Tests (3.4, rails_edge, experimental)	13s
Ruby Tests (head, rails_7.1, experimental)	15s
Ruby Tests (head, rails_7.2, experimental)	14s
Ruby Tests (head, rails_8.0, experimental)	12s
Ruby Tests (head, rails_edge, experimental)	14s
Coverage	4s
	5m 31s

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