Sync OWNERS and add PR template

Signed-off-by: Sascha Grunert <sgrunert@redhat.com>

.github/PULL_REQUEST_TEMPLATE.md

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+<!--  Thanks for sending a pull request!
+
+Please be aware that we're following the Kubernetes guidelines of contributing
+to this project. This means that we have to use this mandatory template for all
+of our pull requests.
+
+Please also make sure you've read and understood our contributing guidelines
+(https://github.com/cri-o/cri-o/blob/main/CONTRIBUTING.md) as well as ensuring
+that all your commits are signed with `git commit -s`.
+
+Here are some additional tips for you:
+
+- If this is your first time, please read our contributor guidelines:
+  https://git.k8s.io/community/contributors/guide#your-first-contribution and
+  developer guide
+  https://git.k8s.io/community/contributors/devel/development.md#development-guide
+- Please label this pull request according to what type of issue you are
+  addressing, especially if this is a release targeted pull request. For
+  reference on required PR/issue labels, read here:
+  https://git.k8s.io/community/contributors/devel/sig-release/release.md#issuepr-kind-label
+- If you want *faster* PR reviews, read how:
+  https://git.k8s.io/community/contributors/guide/pull-requests.md#best-practices-for-faster-reviews
+- If the PR is unfinished, see how to mark it:
+  https://git.k8s.io/community/contributors/guide/pull-requests.md#marking-unfinished-pull-requests
+-->
+
+#### What type of PR is this?
+
+<!--
+Uncomment only one `/kind <>` line, hit enter to put that in a new line, and
+remove leading whitespace from that line:
+-->
+
+<!--
+/kind api-change
+/kind bug
+/kind ci
+/kind cleanup
+/kind dependency-change
+/kind deprecation
+/kind design
+/kind documentation
+/kind failing-test
+/kind feature
+/kind flake
+/kind other
+-->
+
+#### What this PR does / why we need it:
+
+#### Which issue(s) this PR fixes:
+
+<!--
+Automatically closes linked issue when PR is merged.
+Usage: `Fixes #<issue number>`, or `Fixes (paste link of issue)`.
+-->
+
+<!--
+Fixes #
+or
+None
+-->
+
+#### Special notes for your reviewer:
+
+#### Does this PR introduce a user-facing change?
+
+<!--
+If no, just write `None` in the release-note block below. If yes, a release note
+is required: Enter your extended release note in the block below. If the PR
+requires additional action from users switching to the new release, include the
+string "action required".
+
+For more information on release notes see:
+https://git.k8s.io/community/contributors/guide/release-notes.md
+-->
+
+```release-note
+
+```

OWNERS

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+reviewers:
+  - cri-o-reviewers
+approvers:
+  - cri-o-approvers

OWNERS_ALIASES

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+aliases:
+  cri-o-approvers:
+    - mrunalp
+    - giuseppe
+    - umohnani8
+    - saschagrunert
+    - haircommander
+    - fidencio
+    - kolyshkin
+  cri-o-reviewers:
+    - wgahnagl
+    - QiWang19
+    - klihub
+    - sohankunkerkar
+    - hasan4791