[Backport v1.26] Update default Agent version to 7.78.1 and update CSI default tag to 1.2.2

[dd-octo-sts]

Backport d5f00bf from #2939.

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What does this PR do?

See title

Motivation

What inspired you to submit this pull request?

Additional Notes

It's not sustainable to update the CRD everytime we bump the image version for CSI, so removed from types.

Minimum Agent Versions

Are there minimum versions of the Datadog Agent and/or Cluster Agent required?

• Agent: vX.Y.Z
• Cluster Agent: vX.Y.Z

Describe your test plan

Write there any instructions and details you may have to test your PR.

Checklist

• PR has at least one valid label: bug, enhancement, refactoring, documentation, tooling, and/or dependencies
• PR has a milestone or the qa/skip-qa label
• All commits are signed (see: signing commits)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 40.68%. Comparing base (75232bf) to head (2848ecb).

Additional details and impacted files

@@           Coverage Diff           @@
##            v1.26    #2941   +/-   ##
=======================================
  Coverage   40.68%   40.68%           
=======================================
  Files         321      321           
  Lines       28492    28492           
=======================================
  Hits        11593    11593           
  Misses      16044    16044           
  Partials      855      855           

Flag	Coverage Δ
unittests	40.68% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
pkg/images/images.go	97.34% <ø> (ø)

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