Enable iptables by default

[rlmenge]

Merge Checklist

All boxes should be checked before merging the PR (just tick any boxes which don't apply to this PR)

• The toolchain has been rebuilt successfully (or no changes were made to it)
• The toolchain/worker package manifests are up-to-date
• Any updated packages successfully build (or no packages were changed)
• Packages depending on static components modified in this PR (Golang, *-static subpackages, etc.) have had their Release tag incremented.
• Package tests (%check section) have been verified with RUN_CHECK=y for existing SPEC files, or added to new SPEC files
• All package sources are available
• cgmanifest files are up-to-date and sorted (./cgmanifest.json, ./toolkit/scripts/toolchain/cgmanifest.json, .github/workflows/cgmanifest.json)
• LICENSE-MAP files are up-to-date (./LICENSES-AND-NOTICES/SPECS/data/licenses.json, ./LICENSES-AND-NOTICES/SPECS/LICENSES-MAP.md, ./LICENSES-AND-NOTICES/SPECS/LICENSE-EXCEPTIONS.PHOTON)
• All source files have up-to-date hashes in the *.signatures.json files
• sudo make go-tidy-all and sudo make go-test-coverage pass
• Documentation has been updated to match any changes to the build system
• Ready to merge

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Summary

Default presets were introduced here #8028. The default firewall was firewalld which is not fully supported for Azl3. Therefore, set as iptables.

• For an image upgrade, this PR will cause the iptables.service to run by default and thus, will introduce firewall rules by default.
• For a package upgrade to azurelinux-release-3.0-20, the iptables service will be recognized as being allowed by the preset but will NOT be enabled by default. That being said, if an iptables.rpm upgrade comes in afterwards, the rules WILL be turned on
• For a package downgrade to an older package (< azurelinux-release-3.0-20), the preset will show that the iptables service is disabled by the preset but iptables WILL continue to run even after reboot
  Ex of a downgrade then reboot:

Change Log

• Enable iptables service by default

Does this affect the toolchain?

YES

Associated issues

• https://microsoft.visualstudio.com/OS/_workitems/edit/54133320

Test Methodology

• locally built vhdx and booted in hyperv and saw iptables
  sudo make image REBUILD_TOOLS=y CONFIG_FILE=./imageconfigs/core-efi.json QUICK_REBUILD_PACKAGES=y DAILY_BUILD_ID=3-0-20240925 ALLOW_TOOLCHAIN_REBUILDS=y

• Buddy Build:
  https://dev.azure.com/mariner-org/mariner/_build/results?buildId=650648&view=results