chore: update GHA service account for docker build workflows (#2265)

* Update GHA service account for docker build workflows

Switch workload identity service account from
github-gcloud-deployer@roboflow-artifacts to
gha-inference@roboflow-staging for CPU and GPU docker build workflows.

* fix workload identity pool project id

Author: ecarrara

.github/workflows/docker.cpu.yml

@@ -65,7 +65,7 @@ jobs:
         uses: 'google-github-actions/auth@v2'
         id: auth
         with:
-          workload_identity_provider: 'projects/391662651862/locations/global/workloadIdentityPools/github-actions/providers/github'
+          workload_identity_provider: 'projects/878913763597/locations/global/workloadIdentityPools/github-actions/providers/github'
           service_account: 'gha-inference@roboflow-staging.iam.gserviceaccount.com'
           token_format: 'access_token'
       - name: Login to Google Artifact Registry

.github/workflows/docker.gpu.yml

@@ -63,7 +63,7 @@ jobs:
         uses: 'google-github-actions/auth@v2'
         id: auth
         with:
-          workload_identity_provider: 'projects/391662651862/locations/global/workloadIdentityPools/github-actions/providers/github'
+          workload_identity_provider: 'projects/878913763597/locations/global/workloadIdentityPools/github-actions/providers/github'
           service_account: 'gha-inference@roboflow-staging.iam.gserviceaccount.com'
           token_format: 'access_token'
       - name: Login to Google Artifact Registry