feat(kuma-dp) add coredns server to kuma-dp (backport #1811)

[mergify]

This is an automatic backport of pull request #1811 done by Mergify.

Cherry-pick of 49c85ea has failed:

On branch mergify/bp/release-1.1/pr-1811
Your branch is up to date with 'origin/release-1.1'.

You are currently cherry-picking commit 49c85eaf8.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	new file:   app/kuma-dp/pkg/dataplane/dnsserver/config_file.go
	new file:   app/kuma-dp/pkg/dataplane/dnsserver/config_file_test.go
	new file:   app/kuma-dp/pkg/dataplane/dnsserver/dnsserver.go
	new file:   app/kuma-dp/pkg/dataplane/dnsserver/dnsserver_suite_test.go
	new file:   app/kuma-dp/pkg/dataplane/dnsserver/dnsserver_test.go
	new file:   app/kuma-dp/pkg/dataplane/dnsserver/testdata/binary-mock.exit-0.sh
	new file:   app/kuma-dp/pkg/dataplane/dnsserver/testdata/binary-mock.exit-1.sh
	modified:   mk/build.mk
	modified:   mk/docker.mk
	new file:   tools/builds/coredns/templates/plugin.cfg
	modified:   tools/releases/distros.sh
	modified:   tools/releases/dockerfiles/Dockerfile.kuma-dp
	modified:   tools/releases/dockerfiles/Dockerfile.kuma-dp.dockerignore

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   app/kuma-dp/cmd/run.go
	both modified:   pkg/config/app/kuma-dp/config.go
	both modified:   pkg/config/app/kuma-dp/config_test.go
	both modified:   pkg/config/app/kuma-dp/testdata/default-config.golden.yaml

To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

---

Mergify commands and options

More conditions and actions can be found in the documentation.

You can also trigger Mergify actions by commenting on this pull request:

• @Mergifyio refresh will re-evaluate the rules
• @Mergifyio rebase will rebase this PR on its base branch
• @Mergifyio update will merge the base branch into this PR
• @Mergifyio backport <destination> will backport this PR on <destination> branch

Additionally, on Mergify dashboard you can:

• look at your merge queues
• generate the Mergify configuration with the config editor.

Finally, you can contact us on https://mergify.io/

[nickolaev]

@Mergifyio update

[mergify]

Command update: failure

Base branch update has failed
merge conflict between base and head
err-code: E764B