fix: manage keyring files in trusted.gpg.d because apt-key is deprecated

Author: agneum

engine/.gitlab-ci.yml

@@ -85,7 +85,7 @@ build-binary-client-master:
 
     # Install google-cloud-sdk.
     - echo "deb [signed-by=/usr/share/keyrings/cloud.google.gpg] http://packages.cloud.google.com/apt cloud-sdk main" | tee -a /etc/apt/sources.list.d/google-cloud-sdk.list
-    - curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key --keyring /usr/share/keyrings/cloud.google.gpg add -
+    - curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | gpg --dearmor | tee /usr/share/keyrings/cloud.google.gpg > /dev/null
     - apt-get update && apt-get install -y google-cloud-sdk
 
     # Authenticate.
@@ -105,7 +105,7 @@ build-binary-client:
 
     # Install google-cloud-sdk.
     - echo "deb [signed-by=/usr/share/keyrings/cloud.google.gpg] http://packages.cloud.google.com/apt cloud-sdk main" | tee -a /etc/apt/sources.list.d/google-cloud-sdk.list
-    - curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key --keyring /usr/share/keyrings/cloud.google.gpg add -
+    - curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | gpg --dearmor | tee /usr/share/keyrings/cloud.google.gpg > /dev/null
     - apt-get update && apt-get install -y google-cloud-sdk
 
     # Authenticate.
@@ -126,7 +126,7 @@ build-binary-client-rc:
 
     # Install google-cloud-sdk.
     - echo "deb [signed-by=/usr/share/keyrings/cloud.google.gpg] http://packages.cloud.google.com/apt cloud-sdk main" | tee -a /etc/apt/sources.list.d/google-cloud-sdk.list
-    - curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key --keyring /usr/share/keyrings/cloud.google.gpg add -
+    - curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | gpg --dearmor | tee /usr/share/keyrings/cloud.google.gpg > /dev/null
     - apt-get update && apt-get install -y google-cloud-sdk
 
     # Authenticate.