Rename CI New UI workflow to CI UI (#22030)

Renames the `CI New UI` workflow to `CI UI`, dropping the "new ui"
terminology everywhere it appeared.

- Renamed `.github/workflows/ci-new-ui.yaml` → `ci-ui.yaml`
- Updated the workflow `name`, job names (`ui-task`, `ui-sb-build`,
`ui-sb-test`, `ci-ui-status-check`), and internal `needs`/`if`
references
- Updated `visual-regression-dispatch.yaml` which keys off the workflow
name (`CI UI`)

Note: the required status check in branch protection settings (workflow
name / `ci-ui-status-check`) lives in repo settings and will need
updating by an admin so PRs don't wait on the old check name.

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.github/workflows/visual-regression-dispatch.yaml

@@ -10,7 +10,7 @@ name: Visual Regression Dispatch
 
 on:
   workflow_run:
-    workflows: ['CI New UI', 'CI Front']
+    workflows: ['CI UI', 'CI Front']
     types: [completed]
 
 permissions:
@@ -39,7 +39,7 @@ jobs:
           script: |
             const name = context.payload.workflow_run.name;
             const projectByWorkflow = {
-              'CI New UI': 'twenty-ui',
+              'CI UI': 'twenty-ui',
               'CI Front': 'twenty-front',
             };
             const project = projectByWorkflow[name] ?? 'twenty-front';