Add ai-review-agent-provider as pre-req for ai-review-agent-gemini

The ai-review-agent-gemini plugins into the ai-review-agent-provider
using a x-plugin communication mechanism.

Change-Id: If23cbaa9eafd1e93b4a14a26ca9a692d1f9f4e8e

jenkins/gerrit-bazel-plugin-ai-review-agent-gemini.yaml

diff --git a/jenkins/gerrit-bazel-plugin-ai-review-agent-gemini.yaml b/jenkins/gerrit-bazel-plugin-ai-review-agent-gemini.yaml
index d4916e4..538be85 100644
--- a/jenkins/gerrit-bazel-plugin-ai-review-agent-gemini.yaml
+++ b/jenkins/gerrit-bazel-plugin-ai-review-agent-gemini.yaml
@@ -3,6 +3,7 @@
     repo: ai-review-agent-gemini
     organization: GerritForge
     extra-plugins: 'secure-config'
+    extra-gh-repos: 'ai-review-agent-provider'
     jobs:
       - 'plugin-{name}-gh-bazel-{branch}':
           branch: