test: Generate golden files for all (visible) CLI commands (#5479)

cli/testdata/coder_server_postgres-builtin-url_--help.golden

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+Output the connection URL for the built-in PostgreSQL deployment.
+
+Usage:
+  coder server postgres-builtin-url [flags]
+
+Flags:
+  -h, --help      help for postgres-builtin-url
+      --raw-url   Output the raw connection URL instead of a psql command.
+
+Global Flags:
+      --global-config coder   Path to the global coder config directory.
+                              Consumes $CODER_CONFIG_DIR (default "/tmp/coder-cli-test-config")
+      --header stringArray    HTTP headers added to all requests. Provide as "Key=Value".
+                              Consumes $CODER_HEADER
+      --no-feature-warning    Suppress warnings about unlicensed features.
+                              Consumes $CODER_NO_FEATURE_WARNING
+      --no-version-warning    Suppress warning when client and server versions do not match.
+                              Consumes $CODER_NO_VERSION_WARNING
+      --token string          Specify an authentication token. For security reasons setting
+                              CODER_SESSION_TOKEN is preferred.
+                              Consumes $CODER_SESSION_TOKEN
+      --url string            URL to a deployment.
+                              Consumes $CODER_URL
+  -v, --verbose               Enable verbose output.
+                              Consumes $CODER_VERBOSE