chore: replace kind/task and kind/epic labels by issue types (#95)

<!-- markdownlint-disable MD041 -->
#### What this PR does / why we need it

With open-component-model/ocm-project#1216,
all issues should use the type attribute instead of using kind labels.
This PR prepare the label syncer to not re-apply the issue specific kind
labels and adjusts common issue templates

#### Changes

- Removes task and epic label from sync setter
- Adjusts issue templates to use the type field instead of labels

#### Which issue(s) this PR is related to

Related to
open-component-model/ocm-project#1216

Signed-off-by: Andreas Thaler <andreas.thaler01@sap.com>

Author: a-thaler

.github/ISSUE_TEMPLATE/bug.md

@@ -2,8 +2,7 @@
 name: Bug
 about: "🪲 Create a bug to help the projects improve"
 title: ''
-labels: kind/bug, kind/task
-assignees: ''
+type: Bug
 
 ---
 

.github/ISSUE_TEMPLATE/feature.md

@@ -2,7 +2,7 @@
 name: Feature Request
 about: Suggest a feature
 title: ''
-labels: kind/feature
+type: Feature
 
 ---
 

.github/release-drafter.yml

@@ -169,12 +169,6 @@ labels:
 - name: kind/feature
   color: c7def8
   description: new feature, enhancement, improvement, extension
-- name: kind/task
-  color: c7def8
-  description: small task, normally part of feature or epic
-- name: kind/epic
-  color: c7def8
-  description: Large multi-story topic
 - name: kind/good-first-issue
   color: 7057ff
   description: Good for newcomers