Merge branch 'shm-add-llama3-to-explain-fix-test-sub-features' into 'master'

llama3 model for /explain, /fix and /test duo slash commands

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/184176



Merged-by: Igor Drozdov <idrozdov@gitlab.com>
Approved-by: Igor Drozdov <idrozdov@gitlab.com>
Co-authored-by: Patrick Cyiza <jpcyiza@gitlab.com>

ee/lib/gitlab/ai/feature_settings/feature_metadata.yml

@@ -44,6 +44,7 @@ duo_chat_explain_code:
     - mixtral
     - claude_3
     - gpt
+    - llama3
 duo_chat_write_tests:
   title: Write Test
   release_state: BETA
@@ -54,6 +55,7 @@ duo_chat_write_tests:
     - claude_3
     - gpt
     - codestral
+    - llama3
 duo_chat_refactor_code:
   title: Refactor Code
   release_state: BETA