Fix issue title rendering and refactor legacy function names (#32703)

Fix #32700, regression of recent markup refactoring

And by the way, clarify many legacy problems:

1. Some "RenderXxx" functions do not really "render", they only call "post processors"
2. Merge "RenderEmoji | RenderCodeBlock", they are all for "simple issue title"

templates/repo/issue/card.tmpl

@@ -14,7 +14,7 @@
 			<div class="issue-card-icon">
 				{{template "shared/issueicon" .}}
 			</div>
-			<a class="issue-card-title muted issue-title tw-break-anywhere" href="{{.Link}}">{{.Title | ctx.RenderUtils.RenderEmoji | RenderCodeBlock}}</a>
+			<a class="issue-card-title muted issue-title tw-break-anywhere" href="{{.Link}}">{{.Title | ctx.RenderUtils.RenderIssueSimpleTitle}}</a>
 			{{if and $.isPinnedIssueCard $.Page.IsRepoAdmin}}
 				<a role="button" class="issue-card-unpin muted tw-flex tw-items-center" data-tooltip-content={{ctx.Locale.Tr "repo.issues.unpin_issue"}} data-issue-id="{{.ID}}" data-unpin-url="{{$.Page.Link}}/unpin/{{.Index}}">
 					{{svg "octicon-x" 16}}

templates/repo/issue/view_title.tmpl

@@ -13,7 +13,7 @@
 	{{$canEditIssueTitle := and (or .HasIssuesOrPullsWritePermission .IsIssuePoster) (not .Repository.IsArchived)}}
 	<div class="issue-title" id="issue-title-display">
 		<h1 class="tw-break-anywhere">
-			{{ctx.RenderUtils.RenderIssueTitle .Issue.Title ($.Repository.ComposeMetas ctx) | RenderCodeBlock}}
+			{{ctx.RenderUtils.RenderIssueTitle .Issue.Title ($.Repository.ComposeMetas ctx)}}
 			<span class="index">#{{.Issue.Index}}</span>
 		</h1>
 		<div class="issue-title-buttons">