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

---------

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

tests/e2e/actions.test.ts

@@ -27,3 +27,8 @@ test('job queue refreshes with filter open', async ({page, request}) => {
   await expect(page.getByRole('link', {name: 'queued #2'})).toBeVisible();
   await expect(waitingFilter).toBeVisible();
 });
+
+test('job log line permalink expands its step', async ({page}) => {
+  await page.goto('/devtest/repo-action-view/runs/10/jobs/1#jobstep-1-23');
+  await expect(page.getByRole('link', {name: '23', exact: true})).toBeInViewport();
+});