minor #27079 Added .github/CODEOWNERS (lyrixx)

This PR was merged into the 2.7 branch.

Discussion
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Added .github/CODEOWNERS

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

---

refs https://help.github.com/articles/about-codeowners/

Commits
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ffe9aaa Added .github/CODEOWNERS

.github/CODEOWNERS

@@ -0,0 +1,14 @@
+# LDAP
+/src/Symfony/Component/Ldap/* @csarrazi
+# Lock
+/src/Symfony/Component/Lock/* @jderusse
+# Messenger
+/src/Symfony/Bridge/Doctrine/Messenger/* @sroze
+/src/Symfony/Component/Messenger/* @sroze
+# Workflow
+/src/Symfony/Bridge/Twig/Extension/WorkflowExtension.php @lyrixx
+/src/Symfony/Bridge/Twig/Tests/Extension/WorkflowExtensionTest.php @lyrixx
+/src/Symfony/Bundle/FrameworkBundle/Command/WorkflowDumpCommand.php @lyrixx
+/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/ValidateWorkflowsPass.php @lyrixx
+/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/WorkflowGuardListenerPass.php @lyrixx
+/src/Symfony/Component/Workflow/* @lyrixx