Add form submit/cancel buttons and submit behavior to gPAT create form

Daniel Tianrequested to merge
581231-save-granular-pat-when-form-is-submitted into 581232-add-selected-resource-and-permissions-dropdown-to-pat-form

What does this MR do and why?

Adds the submit/cancel buttons and behavior to gPAT create form:
ksnip_20251119-123058

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Related to #581231 (closed)

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