Fix installation layout docs (#2359)

* docs: fleet.yml doesn't exist anymore in newer versions

* docs: this tip doesn't apply anymore to Fleet-managed agents

* docs: add note to users who may want to look for the plain-text version of fleet.yml

* Update docs/en/ingest-management/fleet-agent-proxy-support.asciidoc

Co-authored-by: DeDe Morton <[email protected]>

Co-authored-by: DeDe Morton <[email protected]>
(cherry picked from commit 7b2ce22)

docs/en/ingest-management/fleet-agent-proxy-support.asciidoc

@@ -273,6 +273,8 @@ fleet:
     id: ""
 ----
 
+NOTE: When {agent} runs, the `fleet.yml` file gets encrypted and renamed to `fleet.enc`.
+
 [discrete]
 [[epr-proxy-setting]]
 == Set the proxy URL of the {package-registry}

docs/en/ingest-management/tab-widgets/install-layout.asciidoc

@@ -5,8 +5,8 @@
 {agent} program files
 `/Library/Elastic/Agent/elastic-agent.yml`::
 Main {agent} configuration
-`/Library/Elastic/Agent/fleet.yml`::
-Main {agent} {fleet} configuration
+`/Library/Elastic/Agent/fleet.enc`::
+Main {agent} {fleet} encrypted configuration
 `/Library/Elastic/Agent/data/elastic-agent-*/logs/elastic-agent-json.log`::
 Log files for {agent}footnote:lognumbering[Logs file names end with a date and optional number: log-date.ndjson, log-date-1.ndjson, and so on as new files are created during rotation.]
 `/Library/Elastic/Agent/data/elastic-agent-*/logs/default/*-json.log`::
@@ -22,8 +22,8 @@ Shell wrapper installed into PATH
 {agent} program files
 `/opt/Elastic/Agent/elastic-agent.yml`::
 Main {agent} configuration
-`/opt/Elastic/Agent/fleet.yml`::
-Main {agent} {fleet} configuration
+`/opt/Elastic/Agent/fleet.enc`::
+Main {agent} {fleet} encrypted configuration
 `/opt/Elastic/Agent/data/elastic-agent-*/logs/elastic-agent-json.log`::
 Log files for {agent}footnote:lognumbering[]
 `/opt/Elastic/Agent/data/elastic-agent-*/logs/default/*-json.log`::
@@ -39,8 +39,8 @@ Shell wrapper installed into PATH
 {agent} program files
 `C:\Program Files\Elastic\Agent\elastic-agent.yml`::
 Main {agent} configuration
-`C:\Program Files\Elastic\Agent\fleet.yml`::
-Main {agent} {fleet} configuration
+`C:\Program Files\Elastic\Agent\fleet.enc`::
+Main {agent} {fleet} encrypted configuration
 `C:\Program Files\Elastic\Agent\data\elastic-agent-*\logs\elastic-agent-json.log`::
 Log files for {agent}footnote:lognumbering[]
 `C:\Program Files\Elastic\Agent\data\elastic-agent-*\logs\default\*-json.log*`::
@@ -54,8 +54,8 @@ Log files for {beats} shippers
 {agent} program files
 `/etc/elastic-agent/elastic-agent.yml`::
 Main {agent} configuration
-`/etc/elastic-agent/fleet.yml`::
-Main {agent} {fleet} configuration
+`/etc/elastic-agent/fleet.enc`::
+Main {agent} {fleet} encrypted configuration
 `/var/lib/elastic-agent/data/elastic-agent-*/logs/elastic-agent-json.log`::
 Log files for {agent}footnote:lognumbering[]
 `/var/lib/elastic-agent/data/elastic-agent-*/logs/default/*-json.log*`::
@@ -71,8 +71,8 @@ Shell wrapper installed into PATH
 {agent} program files
 `/etc/elastic-agent/elastic-agent.yml`::
 Main {agent} configuration
-`/etc/elastic-agent/fleet.yml`::
-Main {agent} {fleet} configuration
+`/etc/elastic-agent/fleet.enc`::
+Main {agent} {fleet} encrypted configuration
 `/var/lib/elastic-agent/data/elastic-agent-*/logs/elastic-agent-json.log`::
 Log files for {agent}footnote:lognumbering[]
 `/var/lib/elastic-agent/data/elastic-agent-*/logs/default/*-json.log*`::

docs/en/ingest-management/troubleshooting/troubleshooting.asciidoc

@@ -290,9 +290,6 @@ For example, if you want to include system data, make sure the *System* integrat
 IMPORTANT: The *{ecloud} agent policy* is created only in {ecloud} deployments and, by default,
 does not include the collection of logs of metrics.
 
-You can collect other files to assess and pass to the Elastic team for review for some more advanced debugging cases.
-These files should all be in the {agent} directory on disk: `state.yml`, `fleet.yml` and `elastic-agent.yml`.
-
 [discrete]
 === Collect {agent} diagnostics bundle