feat(pre-commit): add ability to suppress warning for self-hosted (#27664)

docs/usage/self-hosted-experimental.md

@@ -172,3 +172,7 @@ Source: [AWS S3 documentation - Interface BucketEndpointInputConfig](https://doc
 
 If set, Renovate will use SQLite as the backend for the package cache.
 Don't combine with `redisUrl`, Redis would be preferred over SQlite.
+
+## `RENOVATE_X_SUPPRESS_PRE_COMMIT_WARNING`
+
+Suppress the pre-commit support warning in PR bodies.

lib/modules/manager/pre-commit/index.ts

@@ -11,7 +11,10 @@ export const defaultConfig = {
   commitMessageTopic: 'pre-commit hook {{depName}}',
   enabled: false,
   fileMatch: ['(^|/)\\.pre-commit-config\\.ya?ml$'],
-  prBodyNotes: [
-    'Note: The `pre-commit` manager in Renovate is not supported by the `pre-commit` maintainers or community. Please do not report any problems there, instead [create a Discussion in the Renovate repository](https://github.com/renovatebot/renovate/discussions/new) if you have any questions.',
-  ],
+  prBodyNotes: process.env.RENOVATE_X_SUPPRESS_PRE_COMMIT_WARNING
+    ? /* istanbul ignore next */
+      []
+    : [
+        'Note: The `pre-commit` manager in Renovate is not supported by the `pre-commit` maintainers or community. Please do not report any problems there, instead [create a Discussion in the Renovate repository](https://github.com/renovatebot/renovate/discussions/new) if you have any questions.',
+      ],
 };