Use protobuf if possible for core kubernetes clients

[vrutkovs]

Protobuf is more efficient comparing to JSON, but it cannot yet be used for custom types

• I added CHANGELOG entry for this change.
• No user facing changes, so no entry in CHANGELOG was needed.

[openshift-ci]

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci]

@vrutkovs: This PR was included in a payload test run from openshift/kubernetes#2121
trigger 1 job(s) for the /payload-(with-prs|job|aggregate|job-with-prs|aggregate-with-prs) command

• periodic-ci-openshift-release-master-nightly-4.18-e2e-aws-ovn-serial

See details on https://pr-payload-tests.ci.openshift.org/runs/ci/8ead4490-9117-11ef-8662-fdd14cd693cb-0

[openshift-ci]

@vrutkovs: This PR was included in a payload test run from openshift/kubernetes#2121
trigger 1 job(s) for the /payload-(with-prs|job|aggregate|job-with-prs|aggregate-with-prs) command

• periodic-ci-openshift-release-master-nightly-4.18-e2e-aws-ovn-serial

See details on https://pr-payload-tests.ci.openshift.org/runs/ci/17dde510-911a-11ef-90f7-2ad72545de28-0

[openshift-ci]

@vrutkovs: This PR was included in a payload test run from openshift/kubernetes#2121
trigger 1 job(s) for the /payload-(with-prs|job|aggregate|job-with-prs|aggregate-with-prs) command

• periodic-ci-openshift-release-master-nightly-4.18-e2e-aws-ovn-serial

See details on https://pr-payload-tests.ci.openshift.org/runs/ci/7bfd8c40-9150-11ef-90f9-776d17dfc394-0

[openshift-ci]

@vrutkovs: This PR was included in a payload test run from openshift/kubernetes#2121
trigger 1 job(s) for the /payload-(with-prs|job|aggregate|job-with-prs|aggregate-with-prs) command

• periodic-ci-openshift-release-master-nightly-4.18-e2e-aws-ovn-serial

See details on https://pr-payload-tests.ci.openshift.org/runs/ci/f2b93120-9157-11ef-92ee-3ba7dedfccf7-0

[openshift-ci]

@vrutkovs: This PR was included in a payload test run from openshift/kubernetes#2121
trigger 1 job(s) for the /payload-(with-prs|job|aggregate|job-with-prs|aggregate-with-prs) command

• periodic-ci-openshift-release-master-nightly-4.18-e2e-aws-ovn-serial

See details on https://pr-payload-tests.ci.openshift.org/runs/ci/9f7b0780-91d0-11ef-801e-f8298112fd81-0

[openshift-ci]

@vrutkovs: This PR was included in a payload test run from openshift/kubernetes#2121
trigger 1 job(s) for the /payload-(with-prs|job|aggregate|job-with-prs|aggregate-with-prs) command

• periodic-ci-openshift-release-master-nightly-4.18-e2e-aws-ovn-serial

See details on https://pr-payload-tests.ci.openshift.org/runs/ci/b4572c50-92c1-11ef-9dc8-8ee5ecca121f-0

[openshift-ci]

@vrutkovs: This PR was included in a payload test run from openshift/kubernetes#2121
trigger 1 job(s) for the /payload-(with-prs|job|aggregate|job-with-prs|aggregate-with-prs) command

• periodic-ci-openshift-release-master-nightly-4.18-e2e-aws-ovn-serial

See details on https://pr-payload-tests.ci.openshift.org/runs/ci/31391bc0-92ef-11ef-8a0e-563ed35e32a0-0

[openshift-ci]

@vrutkovs: This PR was included in a payload test run from openshift/kubernetes#2124
trigger 1 job(s) for the /payload-(with-prs|job|aggregate|job-with-prs|aggregate-with-prs) command

• periodic-ci-openshift-release-master-nightly-4.18-e2e-aws-ovn-serial

See details on https://pr-payload-tests.ci.openshift.org/runs/ci/fd0725a0-960d-11ef-9b20-c6c69022f342-0

[openshift-ci]

@vrutkovs: This PR was included in a payload test run from openshift/kubernetes#2124
trigger 1 job(s) for the /payload-(with-prs|job|aggregate|job-with-prs|aggregate-with-prs) command

• periodic-ci-openshift-release-master-nightly-4.18-e2e-aws-ovn-serial

See details on https://pr-payload-tests.ci.openshift.org/runs/ci/081fe680-96da-11ef-91f4-cde4735e474b-0

[openshift-ci]

@vrutkovs: This PR was included in a payload test run from openshift/kubernetes#2124
trigger 1 job(s) for the /payload-(with-prs|job|aggregate|job-with-prs|aggregate-with-prs) command

• periodic-ci-openshift-release-master-nightly-4.18-e2e-aws-ovn-serial

See details on https://pr-payload-tests.ci.openshift.org/runs/ci/a7c78740-96f5-11ef-8917-56e896fcf5d0-0

[openshift-ci]

@vrutkovs: This PR was included in a payload test run from openshift/kubernetes#2124
trigger 1 job(s) for the /payload-(with-prs|job|aggregate|job-with-prs|aggregate-with-prs) command

• periodic-ci-openshift-release-master-nightly-4.18-e2e-aws-ovn-serial

See details on https://pr-payload-tests.ci.openshift.org/runs/ci/20169390-9790-11ef-9369-5b6a6b14fab2-0