feat(cwl): Add metric definitions for LiveTail (#916)

## Problem
Cloudwatch wants to monitor usage metrics of the LiveTail integration

## Solution
When starting a session emit telemetry for: 
* Session already started (this case happens when session is already
running, and customer sends a new command that matches the already
running session)
* Has LogEventFilter
* LogStream filter type
* Source of the command (command palette, explorer)

When closing a session: 
* Session duration
* source of cancellation (ex: CodeLens, ClosingEditors)

---

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---------

Co-authored-by: Keegan Irby <keegani@amazon.com>

telemetry/definitions/commonDefinitions.json

@@ -1297,6 +1297,11 @@
             "type": "boolean",
             "description": "Whether the user has access to CodeWhisperer Chat"
         },
+        {
+            "name": "hasLogEventFilterPattern",
+            "type": "boolean",
+            "description": "If LogEvent filter pattern is applied"
+        },
         {
             "name": "hasTextFilter",
             "type": "boolean",
@@ -1438,6 +1443,11 @@
             "type": "string",
             "description": "User locale. Examples: en-US, en-GB, etc."
         },
+        {
+            "name": "logStreamFilterType",
+            "type": "string",
+            "description": "Type of LogStream filter applied to session"
+        },
         {
             "name": "metricId",
             "type": "string",
@@ -1647,6 +1657,11 @@
             "type": "string",
             "description": "The name of the AWS service acted on. These values come from the AWS SDK. To find them in the JAVA SDK search for SERVICE_NAME in each service client, or look for serviceId in metadata in the service2.json"
         },
+        {
+            "name": "sessionAlreadyStarted",
+            "type": "boolean",
+            "description": "Session already open that matches new request"
+        },
         {
             "name": "sessionDuration",
             "type": "int",
@@ -4995,6 +5010,48 @@
                 }
             ]
         },
+        {
+            "name": "cwlLiveTail_Start",
+            "description": "When user starts a new LiveTail command",
+            "metadata": [
+                {
+                    "type": "hasLogEventFilterPattern",
+                    "required": false
+                },
+                {
+                    "type": "logStreamFilterType",
+                    "required": false
+                },
+                {
+                    "type": "result"
+                },
+                {
+                    "type": "sessionAlreadyStarted",
+                    "required": true
+                },
+                {
+                    "type": "source",
+                    "required": true
+                }
+            ]
+        },
+        {
+            "name": "cwlLiveTail_Stop",
+            "description": "When user stops a liveTailSession",
+            "metadata": [
+                {
+                    "type": "duration",
+                    "required": true
+                },
+                {
+                    "type": "result"
+                },
+                {
+                    "type": "source",
+                    "required": true
+                }
+            ]
+        },
         {
             "name": "deeplink_open",
             "description": "User requested that a resource be opened in the browser using the deeplink service",