Allow using localized absolute date times within phrases with place holders and localize issue due date events (#24275)

This refactors the `shared/datetime/short|long|full` templates into a
template helper function, which allows us to render absolute date times
within translatable phrases.

- Follows #23988
- The first attempt was in #24055
- This should help #22664 

Changes:
1. Added the `DateTime` template helper that replaces the
`shared/datetime/short|long|full` templates
2. Used find-and-replace with varying regexes to replace the templates
from step 1 (for example, `\{\{template "shared/datetime/(\S+) \(dict
"Datetime" ([^"]+) "Fallback" ([^\)]+\)?) ?\)?\}\}` -> `{{DateTime "$1
$2 $3}}`)
3. Used the new `DateTime` helper in the issue due date timestamp
rendering

# Before

![image](https://user-images.githubusercontent.com/20454870/233791256-b454c455-aca0-4b76-b300-7866c7bd529e.png)

# After

![image](https://user-images.githubusercontent.com/20454870/233790809-c4913355-2822-4657-bb29-2298deb6d4b3.png)

---------

Signed-off-by: Yarden Shoham <git@yardenshoham.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

templates/admin/queue.tmpl

@@ -155,8 +155,8 @@
 					{{range .Queue.Workers}}
 					<tr>
 						<td>{{.Workers}}{{if .IsFlusher}}<span title="{{$.locale.Tr "admin.monitor.queue.flush"}}">{{svg "octicon-sync"}}</span>{{end}}</td>
-						<td>{{template "shared/datetime/full" (dict "Datetime" (DateFmtLong .Start) "Fallback" (DateFmtLong .Start) )}}</td>
-						<td>{{if .HasTimeout}}{{template "shared/datetime/full" (dict "Datetime" (DateFmtLong .Timeout) "Fallback" (DateFmtLong .Timeout) )}}{{else}}-{{end}}</td>
+						<td>{{DateTime "full" (DateFmtLong .Start) (DateFmtLong .Start)}}</td>
+						<td>{{if .HasTimeout}}{{DateTime "full" (DateFmtLong .Timeout) (DateFmtLong .Timeout)}}{{else}}-{{end}}</td>
 						<td>
 							<a class="delete-button" href="" data-url="{{$.Link}}/cancel/{{.PID}}" data-id="{{.PID}}" data-name="{{.Workers}}" title="{{$.locale.Tr "remove"}}">{{svg "octicon-trash"}}</a>
 						</td>