Cleanup of codeflare-common defaults and Makefile

[sutaakar]

Removing CodeFlare SDK version as CodeFlare SDK doesn't use Go lang tests any more.
Adjusted Makefile to align with current content of defaults.go

Issue link

N/A

What changes have been made

Cleanup of default values and Makefile.

Verification steps

N/A, there should be no functionality change.

Checks

• I've made sure the tests are passing.
• Testing Strategy
  • Unit tests
  • Manual tests
  • Testing is not required for this change

[astefanutti]

Thanks a lot, wanted to do that for a long time :)

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: astefanutti, sutaakar

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