Fix template-field validation in PapermillOperator - #70435
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…e-field validation in PapermillOperator (apache#70435)
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Fixes the
papermillprovider's entry from the #70296 exemption-list burn-down:PapermillOperator.input_nbandoutput_nbare template fields, but were validated in__init__— before Jinja templating runs, so the check ran against the raw un-rendered value.__init__toexecute(), after templating occurs.__init__now only does plain assignments.PapermillOperatorfrom the exemption list.Related to #70296
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