fix(variables): amend creation and update of key-value pairs (#12741)

Closes #12598.
Closes #12716.
Closes #12732.

Reverting changes made in #12606.

Author: MilosPaunovic

ui/src/composables/useBaseNamespaces.ts

@@ -79,16 +79,10 @@ export const useBaseNamespacesStore = () => {
         const data = response.data;
         const contentLength = response.headers?.["content-length"];
 
-        let value = data;
         if (contentLength === (data.length + 2).toString()) {
-            value = `"${data}"`;
+            return `"${data}"`;
         }
-        return {
-            type: response.headers?.["content-type"] || "STRING",
-            value: value,
-            description: response.headers?.["description"] || "",
-            ttl: response.headers?.["ttl"] || undefined
-        };
+        return data;
     }
 
     async function loadInheritedKVs(this: any, id: string) {