Plugins: Ensure plugin dependency field in plugin.json does not require version (#90142)

non required + pattern

docs/sources/developers/plugins/plugin.schema.json

@@ -179,7 +179,7 @@
           "items": {
             "type": "object",
             "description": "Plugin dependency. Used to display information about plugin dependencies in the Grafana UI.",
-            "required": ["id", "name", "type", "version"],
+            "required": ["id", "name", "type"],
             "properties": {
               "id": {
                 "type": "string",
@@ -193,7 +193,8 @@
                 "type": "string"
               },
               "version": {
-                "type": "string"
+                "type": "string",
+                "pattern": "^(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.(0|[1-9]\\d*)$"
               }
             }
           }