Bump gcs-github-runners-cloud-build::cloud-foundation-fabric in /gcp

Bumps [gcs-github-runners-cloud-build::cloud-foundation-fabric](https://github.com/GoogleCloudPlatform/cloud-foundation-fabric) from 53.0.0 to 55.3.0.
- [Release notes](https://github.com/GoogleCloudPlatform/cloud-foundation-fabric/releases)
- [Changelog](https://github.com/GoogleCloudPlatform/cloud-foundation-fabric/blob/master/CHANGELOG.md)
- [Commits](GoogleCloudPlatform/cloud-foundation-fabric@v53.0.0...v55.3.0)

---
updated-dependencies:
- dependency-name: gcs-github-runners-cloud-build::github::GoogleCloudPlatform/cloud-foundation-fabric::v53.0.0
  dependency-version: 55.3.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

gcp/gcs.tf

@@ -13,7 +13,7 @@ module "gcs-github-runners-iac" {
 
 # GCS bucket for Cloud Build source staging
 module "gcs-github-runners-cloud-build" {
-  source        = "git::https://github.com/GoogleCloudPlatform/cloud-foundation-fabric//modules/gcs?ref=v53.0.0"
+  source        = "git::https://github.com/GoogleCloudPlatform/cloud-foundation-fabric//modules/gcs?ref=v55.3.0"
   project_id    = module.project.project_id
   prefix        = module.project.project_id
   name          = "build-${local.region_shortnames[var.region]}"