[CONTP-1976] Document default DDI controller enablement (DataDog#39505)

* [CONTP-114] Update DDI controller setup defaults

Co-authored-by: linear-code[bot] <222613912+linear-code[bot]@users.noreply.github.com>

* [CONTP-114] Clarify version-specific DDI setup

Co-authored-by: linear-code[bot] <222613912+linear-code[bot]@users.noreply.github.com>

* [CONTP-114] Retain Cluster Agent minimum version

Co-authored-by: linear-code[bot] <222613912+linear-code[bot]@users.noreply.github.com>

* chore: move to a shared note at the start of the setup

* chore: use code html tags

Co-authored-by: Janine Chan <64388808+janine-c@users.noreply.github.com>

* chore: improve notes warning

---------

Co-authored-by: linear-code[bot] <222613912+linear-code[bot]@users.noreply.github.com>
Co-authored-by: Janine Chan <64388808+janine-c@users.noreply.github.com>

Author: 3 people

hugo/content/en/containers/guide/configure-autodiscovery-with-the-datadoginstrumentation-crd.md

@@ -37,7 +37,10 @@ Upgrade to  **v7.82+**  of the Datadog Agent and Cluster Agent and install the `
 
 ## Setup
 
-The `DatadogInstrumentation` controller runs in the Cluster Agent and is disabled by default. Enable it with the Datadog Operator or Helm.
+To use `DatadogInstrumentation` (DDI), a controller in your Agent must be enabled to track and reconcile each CR.
+
+<div class="alert alert-info">Skip setup if you're using <code>v1.30+</code> of the Datadog Operator or <code>v3.241.0+</code> of the Datadog Helm Chart since the
+controller is enabled by default starting from these versions.</div>
 
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