Bump CAAPH to v0.4.0

[mboersma]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

This PR bumps the version of CAAPH used in tests to v0.4.0.

Which issue(s) this PR fixes:

N/A, but see #5790 for prior art.

Special notes for your reviewer:

TODOs:

• squashed commits
• includes documentation
• adds unit tests
• cherry-pick candidate

Release note:

NONE

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.94%. Comparing base (a47cdf5) to head (c83293b).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5887   +/-   ##
=======================================
  Coverage   46.93%   46.94%           
=======================================
  Files         279      279           
  Lines       29688    29688           
=======================================
+ Hits        13935    13937    +2     
+ Misses      14940    14938    -2     
  Partials      813      813           

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[jackfrancis]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jackfrancis

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[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 4118e34ad4aaf5f0aca418827ca30f2fee7bafbd