fix(ci/github/agent-container): set the right build conditionals

Author: ayuskauskas

.github/workflows/agent-container.yaml

@@ -5,6 +5,10 @@ on:
   pull_request:
     branches:
       - main
+    paths:
+      - agent/**
+      - containers/agent.Dockerfile
+      - .github/workflows/agent-container.yaml
   push:
     branches:
       - main
@@ -27,7 +31,6 @@ env:
 # There is a single job in this workflow. It's configured to run on the latest available version of Ubuntu.
 jobs:
   build-and-push-agent:
-    if: ${{ (! startsWith(github.ref, 'refs/tags/operator')) && ( startsWith(github.ref, 'pull/') || github.ref == 'refs/heads/main')}}
     runs-on: ubuntu-latest
     # Sets the permissions granted to the `GITHUB_TOKEN` for the actions in this job.
     permissions: