Update build-and-push workflow

Ensure that the build of the operator on the lcore-migration branch is
pushed to quay.io with distinctive tag so taht we can differentiate
between builds from lcore-migration and those from main.

Author: lpiwowar

.github/workflows/build-and-push.yaml

@@ -32,7 +32,9 @@ jobs:
           BUNDLE_IMAGE=${IMAGE_TAG_BASE}-bundle:v${VERSION}
           CATALOG_IMAGE=${IMAGE_TAG_BASE}-catalog:v${VERSION}
 
-          LATEST_TAG=latest
+          # TODO(lpiwowar): Change lcore-migration-latest once lcore-migration branche
+          # gets merged to main.
+          LATEST_TAG=lcore-migration-latest
           OPERATOR_IMAGE_LATEST=${IMAGE_TAG_BASE}:${LATEST_TAG}
           BUNDLE_IMAGE_LATEST=${IMAGE_TAG_BASE}-bundle:${LATEST_TAG}
           CATALOG_IMAGE_LATEST=${IMAGE_TAG_BASE}-catalog:${LATEST_TAG}