chore(mergify): update queue rules minimum required conditions (#31945)

### Reason for this change

Update the Mergify queue rules, so if the [mergify queue command](https://docs.mergify.com/commands/queue/) used it will use the correct queue based on the conditions added to each queue, and to avoid human mistakes if this command used and the PR does not fulfill the minimum requirements to be merged.

### Description of changes

Updated the default-merge, and default-squash queues to add the minimum requirements before to be checked before adding a PR to that queue.

### Checklist
- [X] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: moelasmar

.mergify.yml

@@ -4,7 +4,17 @@ queue_rules:
     update_method: merge
     merge_method: merge
     conditions:
+      - -title~=(WIP|wip)
+      - -label~=(blocked|do-not-merge)
+      # Only if no-squash is set
+      - label~=no-squash
+      - -merged
+      - -closed
+      - "#approved-reviews-by>=1"
+      - -approved-reviews-by~=author
+      - "#changes-requested-reviews-by=0"
       - status-success~=AWS CodeBuild us-east-1
+      - status-success=validate-pr
     commit_message_template: |-
       {{ title }} (#{{ number }})
       {{ body }}
@@ -13,7 +23,16 @@ queue_rules:
     update_method: merge
     merge_method: squash
     conditions:
+      - base!=release
+      - -title~=(WIP|wip)
+      - -label~=(blocked|do-not-merge|no-squash)
+      - -merged
+      - -closed
+      - "#approved-reviews-by>=1"
+      - -approved-reviews-by~=author
+      - "#changes-requested-reviews-by=0"
       - status-success~=AWS CodeBuild us-east-1
+      - status-success=validate-pr
     commit_message_template: |-
       {{ title }} (#{{ number }})
       {{ body }}