Remove redux-form and legacy form framework (#26967)

frontend/src/metabase-types/forms/legacy.ts

frontend/src/metabase-types/guards/forms-legacy.ts

...nd/src/metabase/components/form/CustomForm/CustomForm.tsx

...c/metabase/components/form/CustomForm/CustomFormField.tsx

...m/CustomForm/CustomFormFooter/CustomFormFooter.styled.tsx

...nts/form/CustomForm/CustomFormFooter/CustomFormFooter.tsx

...form/CustomForm/CustomFormFooter/CustomFormFooterTypes.ts

...base/components/form/CustomForm/CustomFormFooter/index.ts

...metabase/components/form/CustomForm/CustomFormMessage.tsx

...metabase/components/form/CustomForm/CustomFormSection.tsx

.../metabase/components/form/CustomForm/CustomFormSubmit.tsx

frontend/src/metabase/components/form/CustomForm/Form.tsx

frontend/src/metabase/components/form/CustomForm/index.ts

frontend/src/metabase/components/form/CustomForm/types.ts

...c/metabase/components/form/FormField/FormField.styled.tsx

...tend/src/metabase/components/form/FormField/FormField.tsx

...tabase/components/form/FormField/FormFieldDescription.tsx

.../src/metabase/components/form/FormField/FormFieldView.tsx

frontend/src/metabase/components/form/FormField/index.ts

...base/components/form/FormikCustomForm/CustomFormField.tsx