Fix cisProfile option with ignition format

[hardys]

Currently there are some stray tabs which break the rendered output, replace these with spaces and add some unit test coverage.

kind/bug

What this PR does / why we need it:

Currently the cisProfile option is broken when selecting ignition format for Leap/SLEMicro deployments

Fixes: #401

Checklist:

• squashed commits into logical changes
• includes documentation
• adds unit tests
• adds or updates e2e tests

[hardys]

Review welcome but marking this as a draft until I've tested it e2e locally

[furkatgofurov7]

@hardys let's rebase before re-running e2e tests on this one, thanks!

[hardys]

@hardys let's rebase before re-running e2e tests on this one, thanks!

Will do, just want to complete some more local testing then will rebase and remove the draft status

Also looks like we'll need #301 so good to see that may be getting revived

[hardys]

After testing locally I found another issue:

	converting base config to Ignition: error converting to Ignition: warning at $.storage.files.1.mode, line 41 col 13: unreasonable mode would be reasonable if specified in octal; remember to add a leading zero

I think that's because the mode constant here needs updating, will add to this PR and re-test

[hardys]

I found some more issues which should now be resolved:

• The CIS prepration script was copies to /opt which isn't writable for Leap/SLEMicro, moved to /etc for both ignition/cloud-init cases so it's alongside the configuration files
• The script was running too early in the ignition flow, prior to the RKE2 installation, so the sysctl file was not yet present
• The script logic to find the sysctl file did not include the path used by the RKE2 installer, now added

[hardys]

The CIS prepration script was copies to /opt which isn't writable for Leap/SLEMicro, moved to /etc for both ignition/cloud-init cases so it's alongside the configuration files

The latest iteration takes a different approach and mounts the /opt subvolume as described in https://en.opensuse.org/Portal:MicroOS/Ignition#Mounts - I'm still not sure writing the file to /opt is ideal, but with this approach I can avoid changing any of the existing cloud-init related code.

[hardys]

@alexander-demicev @furkatgofurov7 this is passing CI and now ready for review - please take a look when you get a moment, thanks!