Add type to issue templates (#43051)

Signed-off-by: stianst <stianst@gmail.com>

.github/ISSUE_TEMPLATE/bug.yml

@@ -1,6 +1,7 @@
 name: Bug Report
 description: Report a non-security sensitive bug in Keycloak
 labels: ["kind/bug", "status/triage"]
+type: bug
 body:
   - type: checkboxes
     attributes:

.github/ISSUE_TEMPLATE/enhancement.yml

@@ -1,6 +1,7 @@
 name: Enhancement Request
 description: Request an enhancement to an existing feature
 labels: ["kind/enhancement", "status/triage"]
+type: enhancement
 body:
   - type: textarea
     id: description

.github/ISSUE_TEMPLATE/feature.yml

@@ -1,6 +1,7 @@
 name: Feature Request
 description: Request a new feature to be added to Keycloak
 labels: ["kind/feature", "status/triage"]
+type: feature
 body:
   - type: textarea
     id: description

.github/ISSUE_TEMPLATE/milestone.yml

@@ -1,6 +1,7 @@
 name: Milestone
 description: Milestones are used to break up larger features
 labels: ["kind/milestone", "status/triage"]
+type: milestone
 body:
   - type: textarea
     id: description

.github/ISSUE_TEMPLATE/task.yml

@@ -1,6 +1,7 @@
 name: Task
 description: Any tasks that are not directly adding a new feature, enhancement or fixing a bug
 labels: ["kind/task"]
+type: task
 body:
   - type: textarea
     id: description