build: use gzip compression on pkg_tar

[Acedus]

What this PR does / why we need it:
Before the transition from rules_docker to rules_oci resulting container image sizes were around 1/3rd what they are now. This is because rules_docker used gzip compression implicitly[1].

This PR explicitly uses gzip compression for all pkg_tar directives in order to restore the resulting images to their original sizes.

[1] https://github.com/bazelbuild/rules_docker/blob/master/docs/container.md#container_image

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

Release note:

NONE

[Acedus]

/cc @akalenyu

[Acedus]

fyi, might need this in kv/kv as well...

[akalenyu]

really nice find on this one!
apparently it was listed as a breaking change in https://github.com/bazel-contrib/rules_oci/releases/tag/v2.0.0
/cc @dhiller

/approve
/lgtm

[kubevirt-bot]

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This pull-request has been approved by: akalenyu

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[Acedus]

Failures happen due to the archive repacking.
I suggested this for bazeldnf: rmohr/bazeldnf#170, need to see if it's acceptable, otherwise we'll need to use some hacks or give up compression of the rpm archives.

[Acedus]

/hold

[Acedus]

Unholding for now, if rmohr/bazeldnf#170 ever makes it in, we'll use it as well for rpm compression.

/unhold

[coveralls]

coverage: 49.411% (-0.007%) from 49.418%
when pulling ee06ce1 on Acedus:compress-image-binaries
into 22774aa on kubevirt:main.

[akalenyu]

/retest

[akalenyu]

Unholding for now, if rmohr/bazeldnf#170 ever makes it in, we'll use it as well for rpm compression.

/unhold

/lgtm

[akalenyu]

/test pull-containerized-data-importer-e2e-nfs
ooms in ci