chore: no need for Signal type in commons, only used once

perses/config/common/common.cue

@@ -1,8 +1,5 @@
 package common
 
-// Signal is the telemetry signal type for a builder query.
-#Signal: "metrics" | "logs" | "traces"
-
 // QueryName is a valid identifier for a query (e.g., "A", "B1", "my_query").
 #QueryName: =~"^[A-Za-z][A-Za-z0-9_]*$"
 

perses/config/schemas/signoz-builder-query/signoz-builder-query.cue

@@ -6,7 +6,7 @@ import "github.com/signoz/signoz/schemas/common"
 kind: "SigNozBuilderQuery"
 spec: close({
 	name:       common.#QueryName
-	signal:     common.#Signal
+	signal:     "metrics" | "logs" | "traces"
 	expression: string
 	disabled?:  bool | *false