build(nodejs_mono_repo): automatically tag with infrastructure-public-image- prefix (#7911)

Uses the BUILD_ID in case of a rebuild from the same commit SHA

Source-Link: googleapis/synthtool@1171199
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-nodejs-mono-repo:latest@sha256:b1ef080074eefaa6ae6c46462034d1f3ceb0b1067e47479d750695ecb3b9fb7e

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Shivanee <46910562+shivanee-p@users.noreply.github.com>

Author: gcf-owl-bot[bot]

.github/.OwlBot.lock.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-nodejs-mono-repo:latest
-  digest: sha256:f70290d6665747e11cdf9630141b0d01caec8223d6a26eda0484786f5ba15167
-# created: 2026-03-16T16:18:29.328142363Z
+  digest: sha256:b1ef080074eefaa6ae6c46462034d1f3ceb0b1067e47479d750695ecb3b9fb7e
+# created: 2026-03-28T01:31:14.274187079Z