fix: remove duplicate running indicator from queue header (#9032)

## Summary
Remove the extra running-workflow indicator from the expanded Queue
Progress Overlay header to avoid duplicate running-count signals.

## Changes
- Remove `showConcurrentIndicator` and `concurrentWorkflowCount` props
from `QueueOverlayHeader`.
- Stop passing those props through `QueueOverlayExpanded` and
`QueueProgressOverlay`.
- Simplify `QueueOverlayHeader` tests to reflect the updated header
behavior.

## Why
The expanded header was showing redundant running status information
alongside existing running/queued summaries.

Prevent this:
<img width="240" height="92" alt="image"
src="https://github.com/user-attachments/assets/f4b1775c-b347-46f7-8668-3a1054365ada"
/>

Design:
https://www.figma.com/design/LVilZgHGk5RwWOkVN6yCEK/Queue-Progress-Modal?node-id=4024-28147&m=dev

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9032-fix-remove-duplicate-running-indicator-from-queue-header-30d6d73d365081d19041de2f1b0c8886)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Johnpaul Chiwetelu <49923152+Myestery@users.noreply.github.com>
Co-authored-by: GitHub Action <action@github.com>

src/components/queue/QueueOverlayHeader.test.ts

@@ -51,7 +51,6 @@ const i18n = createI18n({
       g: { more: 'More' },
       sideToolbar: {
         queueProgressOverlay: {
-          running: 'running',
           queuedSuffix: 'queued',
           clearQueued: 'Clear queued',
           clearQueueTooltip: 'Clear queue',
@@ -69,8 +68,6 @@ const mountHeader = (props = {}) =>
   mount(QueueOverlayHeader, {
     props: {
       headerTitle: 'Job queue',
-      showConcurrentIndicator: true,
-      concurrentWorkflowCount: 2,
       queuedCount: 3,
       ...props
     },
@@ -86,21 +83,9 @@ describe('QueueOverlayHeader', () => {
     mockSetSetting.mockClear()
   })
 
-  it('renders header title and concurrent indicator when enabled', () => {
-    const wrapper = mountHeader({ concurrentWorkflowCount: 3 })
-
+  it('renders header title', () => {
+    const wrapper = mountHeader()
     expect(wrapper.text()).toContain('Job queue')
-    const indicator = wrapper.find('.inline-flex.items-center.gap-1')
-    expect(indicator.exists()).toBe(true)
-    expect(indicator.text()).toContain('3')
-    expect(indicator.text()).toContain('running')
-  })
-
-  it('hides concurrent indicator when flag is false', () => {
-    const wrapper = mountHeader({ showConcurrentIndicator: false })
-
-    expect(wrapper.text()).toContain('Job queue')
-    expect(wrapper.find('.inline-flex.items-center.gap-1').exists()).toBe(false)
   })
 
   it('shows clear queue text and emits clear queued', async () => {