metrics,scripts: keep TiCDC dashboard titles consistent (pingcap#4765)

close pingcap#4764

Author: tenfyzhong

metrics/grafana/ticdc_new_arch.json

@@ -27296,7 +27296,7 @@
     ]
   },
   "timezone": "browser",
-  "title": "test-cluster-TiCDC-New-Arch",
+  "title": "${DS_TEST-CLUSTER}-TiCDC-New-Arch",
   "uid": "YiGL8hBZ0aac",
   "version": 40
 }

metrics/nextgengrafana/ticdc_new_arch_next_gen.json

@@ -27296,7 +27296,7 @@
     ]
   },
   "timezone": "browser",
-  "title": "test-cluster-TiCDC-New-Arch",
+  "title": "${DS_TEST-CLUSTER}-TiCDC-New-Arch",
   "uid": "YiGL8hBZ0aac",
   "version": 40
 }

metrics/nextgengrafana/ticdc_new_arch_with_keyspace_name.json

@@ -11488,7 +11488,7 @@
     ]
   },
   "timezone": "browser",
-  "title": "test-cluster-TiCDC-New-Arch",
+  "title": "${DS_TEST-CLUSTER}-TiCDC-New-Arch-KeyspaceName",
   "uid": "lGT5hED6vqTn",
   "version": 40
 }

scripts/generate-next-gen-metrics.sh

@@ -41,6 +41,16 @@ if [ ! -f "$NEXT_GEN_SHARED_FILE" ]; then
 	exit 1
 fi
 
+require_file_contains() {
+	local file="$1"
+	local expected="$2"
+
+	if ! grep -Fq -- "$expected" "$file"; then
+		echo "Error: Generated file '$file' must contain '$expected'" >&2
+		exit 1
+	fi
+}
+
 # This jq script filters the panels in the Grafana dashboard.
 # It defines a recursive function `filter_panels` that:
 # 1. For panels of type "row", it recursively filters their sub-panels.
@@ -64,9 +74,11 @@ jq '
 
 "$SED_CMD" "${SED_INPLACE_ARGS[@]}" "s/\${DS_TEST-CLUSTER}-TiCDC-New-Arch/&-KeyspaceName/" "$NEXT_GEN_USER_FILE"
 "$SED_CMD" "${SED_INPLACE_ARGS[@]}" "s/YiGL8hBZ0aac/lGT5hED6vqTn/" "$NEXT_GEN_USER_FILE"
+require_file_contains "$NEXT_GEN_USER_FILE" "-KeyspaceName"
 
 echo "Userscope dashboard created at '$NEXT_GEN_USER_FILE'"
 
 "$SED_CMD" "${SED_INPLACE_ARGS[@]}" 's/\([^$]\)tidb_cluster/\1sharedpool_id/g' "$NEXT_GEN_SHARED_FILE"
+require_file_contains "$NEXT_GEN_SHARED_FILE" "sharedpool_id"
 
 echo "Sharedscope dashboard created at '$NEXT_GEN_SHARED_FILE'"