[IMPROVEMENT] Remove the default CSI component images in longhorn-manager

[c3y1huang]

Is your improvement request related to a feature? Please describe (👍 if you like this request)

We have already defined the default images in the YAML and chart. To prevent confusion, we should remove these duplicated definitions.

Describe the solution you'd like

Remove the default CSI component images in longhorn-manager.

Describe alternatives you've considered

Additional context

#9564 (comment)

[longhorn-io-github-bot]

Pre Ready-For-Testing Checklist

• Where is the reproduce steps/test steps documented?
  The reproduce steps/test steps are at:

• Is there a workaround for the issue? If so, where is it documented?
  The workaround is at:

• Does the PR include the explanation for the fix or the feature?

• Does the PR include deployment change (YAML/Chart)? If so, where are the PRs for both YAML file and Chart?
  The PR for the YAML change is at:
  The PR for the chart change is at:

• Have the backend code been merged (Manager, Engine, Instance Manager, BackupStore etc) (including backport-needed/*)?
  The PR is at chore: remove default CSI component images longhorn-manager#3256

• Which areas/issues this PR might have potential impacts on?
  Area longhorn-manager, install/uninstall
  Issues

• If labeled: require/LEP Has the Longhorn Enhancement Proposal PR submitted?
  The LEP PR is at

• If labeled: area/ui Has the UI issue filed or ready to be merged (including backport-needed/*)?
  The UI issue/PR is at

• If labeled: require/doc Has the necessary document PR submitted or merged (including backport-needed/*)?
  The documentation issue/PR is at

• If labeled: require/automation-e2e Has the end-to-end test plan been merged? Have QAs agreed on the automation test case? If only test case skeleton w/o implementation, have you created an implementation issue (including backport-needed/*)
  The automation skeleton PR is at
  The automation test case PR is at
  The issue of automation test case implementation is at (please create by the template)

• If labeled: require/automation-engine Has the engine integration test been merged (including backport-needed/*)?
  The engine automation PR is at

• If labeled: require/manual-test-plan Has the manual test plan been documented?
  The updated manual test plan is at

• If the fix introduces the code for backward compatibility Has a separate issue been filed with the label release/obsolete-compatibility?
  The compatibility issue is filed at

[yangchiu]

Verification passed on master-head (longhorn-manager 70ac3bc). Daily regression test passed without CSI-related test case failures: https://ci.longhorn.io/job/public/job/master/job/sles/job/amd64/job/longhorn-tests-sles-amd64/1093/