chore: refactor legacy JS init code to use "data-global-init" (#39836)

Move the remaining legacy init code, which probed page classes with
`querySelector`, to `data-global-init`, so each feature initializes from
its own element. `hashchange` listeners now go through one module that
runs them in priority order, because independent listeners broke when
mount order changed.

- Convert issue list, diff, repo create, settings and org team inits to
`data-global-init`
- Run `hashchange` listeners by priority, the diff scroll handler last
- Make the devtest mock's failing log requests deterministic
- Add e2e tests for diff tree navigation to folded files and job log
permalinks

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Co-authored-by: silverwind <me@silverwind.io>

templates/user/settings/profile.tmpl

@@ -5,7 +5,7 @@
 		</h4>
 		<div class="ui attached segment">
 			<p>{{ctx.Locale.Tr "settings.profile_desc"}}</p>
-			<form class="ui form" action="{{.Link}}" method="post">
+			<form class="ui form" action="{{.Link}}" method="post" data-global-init="initUserSettingsForm">
 				<div class="required field {{if .Err_Name}}error{{end}}">
 					<label for="username">{{ctx.Locale.Tr "username"}}
 						<span class="tw-text-red tw-hidden" id="name-change-prompt"> {{ctx.Locale.Tr "settings.change_username_prompt"}}</span>