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/repo/diff/box.tmpl

@@ -35,7 +35,7 @@
 			{{template "repo/diff/whitespace_dropdown" .}}
 			{{template "repo/diff/options_dropdown" .}}
 			{{if .PageIsPullFiles}}
-				<div id="diff-commit-select" data-merge-base="{{$.CompareInfo.CompareBase}}" data-issuelink="{{$.Issue.Link}}"
+				<div id="diff-commit-select" data-global-init="initDiffCommitSelect" data-merge-base="{{$.CompareInfo.CompareBase}}" data-issuelink="{{$.Issue.Link}}"
 					data-queryparams="?style={{if $.IsSplitStyle}}split{{else}}unified{{end}}&whitespace={{$.WhitespaceBehavior}}&show-outdated={{$.ShowOutdatedComments}}"
 					data-text-filter-changes-by-commit="{{ctx.Locale.Tr "repo.pulls.filter_changes_by_commit"}}">
 					{{/* the following will be replaced by vue component, but this avoids any loading artifacts till the vue component is initialized */}}
@@ -63,7 +63,7 @@
 	<div id="diff-container">
 		{{if $showFileTree}}
 			{{$.FileIconPoolHTML}}
-			<div id="diff-file-tree" class="tw-hidden not-mobile" data-locale="{{JsonUtils.EncodeToString (dict
+			<div id="diff-file-tree" data-global-init="initDiffFileTree" class="tw-hidden not-mobile" data-locale="{{JsonUtils.EncodeToString (dict
 				"filterFiles" (ctx.Locale.Tr "repo.diff.filter_files")
 				"filterFilesClear" (ctx.Locale.Tr "repo.diff.filter_files_clear")
 				"filterByFileExtension" (ctx.Locale.Tr "repo.diff.filter_by_file_extension")