Flexible install changes for kube components

[andrewd-zededa]

Description

Skip longhorn if the kernel module did not insert.
This is seen on some arm devices with alternative kernels.
Skip uninstall steps if namespaces are missing.
cdi and kubevirt are currently skipped during first boot
install on arm devices.

PR dependencies

None

How to test and validate this PR

TBD

Changelog notes

TBD

PR Backports

• 16.0-stable: ?
• 14.5-stable: No, as the feature is not available there.
• 13.4-stable: No, as the feature is not available there.

Checklist

• I've provided a proper description
• I've added the proper documentation
• I've tested my PR on amd64 device
• I've tested my PR on arm64 device
• I've written the test verification instructions
• I've set the proper labels to this PR

And the last but not least:

• I've checked the boxes above, or I've provided a good reason why I didn't
  check them.

Please, check the boxes above after submitting the PR in interactive mode.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 29.49%. Comparing base (2281599) to head (50b0394).
⚠️ Report is 273 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5606      +/-   ##
==========================================
+ Coverage   19.52%   29.49%   +9.96%     
==========================================
  Files          19       18       -1     
  Lines        3021     2417     -604     
==========================================
+ Hits          590      713     +123     
+ Misses       2310     1552     -758     
- Partials      121      152      +31     

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