Bump Go build version to 1.20.5

- Update to use builder image to 4.19.0 enabling builds to use the
  Go 1.20.5 compiler set.

Closes https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/8053

Changelog: changed
Signed-off-by: Robert Marshall <[email protected]>

Author: Robert Marshall

.gitlab-ci.yml

@@ -42,7 +42,7 @@ variables:
   # To be used for images that exist only on dev.gitlab.org
   DEV_BUILDER_IMAGE_REGISTRY: 'dev.gitlab.org:5005/cookbooks/gitlab-omnibus-builder'
   PUBLIC_BUILDER_IMAGE_REGISTRY: "registry.gitlab.com/gitlab-org/gitlab-omnibus-builder"
-  BUILDER_IMAGE_REVISION: "4.17.0"
+  BUILDER_IMAGE_REVISION: "4.19.0"
   # The registry to pull the assets image from
   ASSET_REGISTRY: "${CI_REGISTRY}"
   ASSET_SYNC_EXISTING_REMOTE_FILES: "keep"