[RHELC-1329] Port pkghandler.preserve_only_rhel_kernel() to Action framework

[pr-watson]

This PR ports the function preserve_only_rhel_kernel to the action framework. Changing any relevant logger crictical, warning and info messages to Error results and Warning and Info messages respectively.

Jira Issues:

• RHELC-1329

Checklist

• [x] PR has been tested manually in a VM (either author or reviewer)
• [ ] Jira issue has been made public if possible
• [x] [RHELC-] is part of the PR title
• [x] GitHub label has been added to help with Release notes
• [x] PR title explains the change from the user's point of view
• [x] Code and tests are documented properly
• [x] The commits are squashed to as few commits as possible (without losing data)
• [ ] When merged: Jira issue has been updated to Release Pending if relevant

[pr-watson]

@r0x0d will add the tests after we confirm that this structure is okay for the port

[has-bot]

/packit test --labels sanity

---

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 97.41379% with 3 lines in your changes missing coverage. Please review.

Project coverage is 96.13%. Comparing base (703e2b3) to head (d39ebc4).

Files	Patch %	Lines
...el/actions/conversion/preserve_only_rhel_kernel.py	97.41%	2 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1250 +/- ## ========================================== + Coverage 95.92% 96.13% +0.21% ========================================== Files 56 57 +1 Lines 4784 4818 +34 Branches 750 846 +96 ========================================== + Hits 4589 4632 +43 + Misses 111 107 -4 + Partials 84 79 -5 ``` | [Flag](https://app.codecov.io/gh/oamg/convert2rhel/pull/1250/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=oamg) | Coverage Δ | | |---|---|---| | [centos-linux-7](https://app.codecov.io/gh/oamg/convert2rhel/pull/1250/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=oamg) | `91.39% <97.41%> (+0.25%)` | :arrow_up: | | [centos-linux-8](https://app.codecov.io/gh/oamg/convert2rhel/pull/1250/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=oamg) | `92.31% <97.41%> (?)` | | | [centos-linux-9](https://app.codecov.io/gh/oamg/convert2rhel/pull/1250/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=oamg) | `92.35% <97.41%> (+0.24%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=oamg#carryforward-flags-in-the-pull-request-comment) to find out more.

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[pr-watson]

/packit build

[r0x0d]

/packit build

[r0x0d]

/packit test --labels sanity