[Internal]: Document new "Copy support info" button for agentless integrations + update agentless resources toggle location

### Description

Kibana PR [elastic/kibana#267660](https://github.com/elastic/kibana/pull/267660) (merged 2026-05-13) shipped two user-facing changes to agentless integrations that need doc updates:

1. New "Copy support info" action
A new context menu item was added to the agentless integration row on the package/integration details page (Actions menu → "Copy support info"). When clicked, it copies a `key=value` block to the clipboard that customers can paste into a support ticket:
```
elastic-support-bundle
deployment_id= # or project_id= on Serverless
cluster_id=
policy_id=
integration=
```
This lets support engineers identify the underlying agentless container without back-and-forth. The button only appears for agentless policies. Support engineers reference this block format via an internal KB article, so getting the field names correct in docs matters.

2. "Show agentless resources" toggle moved
The toggle that shows/hides agentless resources in Fleet was moved from Fleet → Settings → Advanced to Fleet → `/app/fleet/_debug` (a new debug page).

### Existing docs

There is [Elastic Security agentless integrations FAQs](https://www.elastic.co/docs/manage-data/ingest/agentless/agentless-integrations-faq) but I'm not sure if it's the right place to document it.

### Resources

Links

- PR: https://github.com/elastic/kibana/pull/267660
- Related issue: https://github.com/elastic/ingest-dev/issues/7571
- Support KB referencing the block format: (support.elastic.dev/redacted)

### Which deployment methods does this change impact?

Elastic Cloud (Hosted and Serverless) only

### Feature differences

It's basically used in Agentless, both ECH (Elastic Cloud Hosted) and Serverless.

### What Elastic Stack release is this request related to?

N/A

### Serverless release

_No response_

### Collaboration model

The documentation team will create the first draft

### Point of contact.

**Main contact:** `@criamico`

**Stakeholders:**

TriageBot — Complete

### 2026-07-02

**Type:** enhancement

**Section check:**
- ✅ Problem statement: Two specific UI changes clearly described with technical detail and the business reason (support engineers need the key=value block)
- ✅ Proposed outcome: Implied — document the new "Copy support info" action and the relocated "Show agentless resources" toggle

**Ambiguity / scope notes:**
- Placement uncertainty ("I'm not sure if it's the right place") is appropriate hedging; the assignee can determine the correct location

**Cross-references:**
- elastic/kibana#267660 — author confirms merged 2026-05-13
- elastic/ingest-dev#7571 — external repo, not verified
- (support.elastic.dev/redacted) — internal KB, not accessible externally

**Next step:** none — issue is complete

> Generated by [Gh Aw Issue Triage](https://github.com/elastic/docs-content/actions/runs/28601422205) for issue #7175 · 34.6 AIC · ⌖ 9.94 AIC · ⊞ 9.1K · [◷](https://github.com/search?q=repo%3Aelastic%2Fdocs-content+is%3Aissue+%22gh-aw-workflow-call-id%3A+elastic%2Fdocs-content%2Fgh-aw-issue-triage%22&type=issues)