chore: update dashboard for ai observability (#12875)

#### Description
Adds the actual dashboard to the backend.

<!--Reference issues using `Closes #issue-number` to enable automatic
closure on merge. -->
#### Issues closed by this PR
Part of https://github.com/SigNoz/engineering-pod/issues/4501

### Additional information
- Draft until the dashboard DTO changes merge; the query fixes below
land on top of them.
- will update the dashboard based on ai query builder

pkg/modules/spanmapper/implspanmapper/fs/definitions/gen_ai.llm.json

@@ -1,5 +1,5 @@
 {
-  "version": 1,
+  "version": 2,
   "definition": {
     "name": "gen_ai.llm",
     "condition": {
@@ -114,20 +114,6 @@
           ]
         }
       },
-      {
-        "name": "gen_ai.operation.name",
-        "fieldContext": "attribute",
-        "config": {
-          "sources": [
-            {
-              "key": "llm.request.type",
-              "context": "attribute",
-              "operation": "copy",
-              "priority": 10
-            }
-          ]
-        }
-      },
       {
         "name": "gen_ai.usage.input_tokens",
         "fieldContext": "attribute",
@@ -293,6 +279,12 @@
               "operation": "copy",
               "priority": 30
             },
+            {
+              "key": "ai.response.toolCalls",
+              "context": "attribute",
+              "operation": "copy",
+              "priority": 25
+            },
             {
               "key": "ai.response.text",
               "context": "attribute",
@@ -329,7 +321,7 @@
         }
       },
       {
-        "name": "gen_ai.response.finish_reason",
+        "name": "gen_ai.response.finish_reasons",
         "fieldContext": "attribute",
         "config": {
           "sources": [

pkg/modules/spanmapper/implspanmapper/fs/definitions/gen_ai.tool.json

@@ -1,11 +1,20 @@
 {
-  "version": 1,
+  "version": 2,
   "definition": {
     "name": "gen_ai.tool",
     "condition": {
       "attributes": [
         {
-          "value": "tool"
+          "value": "tool.name"
+        },
+        {
+          "value": "ai.toolCall."
+        },
+        {
+          "value": "tool_call_args"
+        },
+        {
+          "value": "tool_response"
         }
       ],
       "resource": []