cos-customizer 2023.6.16 release

Added a flag to specify cos-gpu-installer-v1 container and update
cos-gpu-installer:v1 container to v20230815.

BUG=b/295566846
TEST=manual
RELEASE_NOTE=Add a flag to cos-customizer that allows specification of the
cos-gpu-installer-v1 container in the install-gpu step. Also update
cos-gpu-installer-v1 container to v20230815 for the install-gpu step of
cos-customizer.

Change-Id: I6e2e7592766aaedbd06b5057fbce5eb708d1ed59
Reviewed-on: https://cos-review.googlesource.com/c/cos/tools/+/55175
Tested-by: Arnav Kansal <rnv@google.com>
Cloud-Build: GCB Service account <228075978874@cloudbuild.gserviceaccount.com>
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
diff --git a/release/release-versions.yaml b/release/release-versions.yaml
index 68ec03d..23ae618 100644
--- a/release/release-versions.yaml
+++ b/release/release-versions.yaml
@@ -1,9 +1,9 @@
 - staging_container_name: "cos-customizer"
   release_container_name: "cos-customizer"
-  build_commit: "1893781f5e8942783774f958af613c082a566113"
+  build_commit: "341e398593ce7e096cf3b32462b4a1c04a25cd34"
   release_tags:
     - "latest"
-    - "v20230616"
+    - "v20230815"
 - staging_container_name: "toolbox"
   release_container_name: "toolbox"
   build_commit: "3e0ddb45b4c2ee772555472096bc4efe7c4248d6"