Fix ChatBot channel ref + add notification management permissions (#650)

**Why?**

The AWS Chatbot integration had an error that was introduced with the
refactoring in v3.2.0 release. This prevented ChatBot configurations to be
applied correctly.

Additionally, the pipeline creation process did not have the required
permissions to manage the pipeline notifications yet.

**What?**

Both issues are addressed in this change request.

src/lambda_codebase/initial_commit/bootstrap_repository/adf-bootstrap/deployment/pipeline_management.yml

@@ -875,6 +875,19 @@ Resources:
                 Condition:
                   StringEquals:
                     'codestar-connections:PassedToService': 'codepipeline.amazonaws.com'
+              - Effect: Allow
+                Sid: "AllowChatBotOperations"
+                Action:
+                  - "codestar-notifications:CreateNotificationRule"
+                  - "codestar-notifications:DeleteNotificationRule"
+                  - "codestar-notifications:DescribeNotificationRule"
+                  - "codestar-notifications:ListNotificationRules"
+                  - "codestar-notifications:Subscribe"
+                  - "codestar-notifications:TagResource"
+                  - "codestar-notifications:Unsubscribe"
+                  - "codestar-notifications:UntagResource"
+                  - "codestar-notifications:UpdateNotificationRule"
+                Resource: "*"
               - Effect: Allow
                 Action:
                   - "events:PutRule"

src/lambda_codebase/initial_commit/bootstrap_repository/adf-build/shared/cdk/cdk_constructs/adf_chatbot.py

@@ -47,7 +47,7 @@ def __init__(
         )
         pipeline_arn = (
             f"arn:{stack.partition}:codepipeline:{ADF_DEPLOYMENT_REGION}:"
-            "{ADF_DEPLOYMENT_ACCOUNT_ID}:{pipeline.ref}"
+            f"{ADF_DEPLOYMENT_ACCOUNT_ID}:{pipeline.ref}"
         )
         cp_notifications.CfnNotificationRule(
             scope,