Dev: Allow analysts to view/edit "Rejected" email associated with a sub-category before saving

[Katherine-Osos]

Issue description

In #1578, we allowed analysts to select a specific reason for rejection and for an email to be sent to the requestor. In this issue, let's display the text of the email template once the category is selected, letting analysts review the template (confirming it meets the need), and then send out an email.

Acceptance criteria

• Flow for "rejection" email and editing of the text follows the same flow as Action Needed, Reference some ACs of Enhance analysts ability to update "Action needed" email text #2470

Additional context

Reference the work done on this related ticket that exposed the content for "action needed" emails: #2332

Links to other issues

Blocked by:

• Dev: Allow an analyst to customize "Action needed" emails before sending #1901
• Enhance analysts ability to update "Action needed" email text #2470
• Action needed email editor breaks resize, and throws a reference error #2651

[zandercymatics]

Moved this ticket back to planned as not much work was done on here. Some changes in AC were made to the action needed ticket (which this ticket ideally should rely on from an architectural perspective) - so this needs to wait on that as otherwise it'd be a hamster wheel sort of situation

[vickyszuchin]

Add "blocked" label on ticket while we determine if there is a dependency. @abroddrick

[vickyszuchin]

Per conversation in design/product meeting, this ticket need to be pushed out a couple of sprints (per decision by @abroddrick ). This ticket is related to the the work from #1901, and a follow-on ticket suggested in today's design/product meeting. #2355 will need to wait #1901 closes and the follow-on ticket is completed.

[abroddrick]

removing blocked as this is no longer slotted for the current sprint