Add mock interface and avoid validating tokens

[kim-tsao]

What does this PR do?:

• Expose the interface for mock testing parent URI references for external clients
• Remove duplicate util functions. There are identical copies in the util and git packages and I believe this was done in order to avoid cyclic dependencies. Rather than maintain two copies, I will refactor everything into one package (util) which this may affect our clients if they use the util methods from the git package.
• Ensure git vendor validation is in place for parent URI references. Similar to the main devfile scenario, we do not error out if absolute URL is not a supported git vendor
• Fix test cases

Which issue(s) this PR fixes:

devfile/api#1216

PR acceptance criteria:

Testing and documentation do not need to be complete in order for this PR to be approved. We just need to ensure tracking issues are opened.

• Open new test/doc issues under the devfile/api repo
• Check each criteria if:
• There is a separate tracking issue. Add the issue link under the criteria
  or
• test/doc updates are made as part of this PR
• If unchecked, explain why it's not needed

• Unit/Functional tests

• QE Integration test

• Documentation

• Client Impact

• Gosec scans

How to test changes / Special notes to the reviewer:

[codecov]

Codecov Report

Patch coverage: 41.66% and project coverage change: +1.12% 🎉

Comparison is base (6c4a5b8) 59.72% compared to head (d4a4f5a) 60.84%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #178      +/-   ##
==========================================
+ Coverage   59.72%   60.84%   +1.12%     
==========================================
  Files          41       41              
  Lines        5125     5006     -119     
==========================================
- Hits         3061     3046      -15     
+ Misses       1868     1767     -101     
+ Partials      196      193       -3     

Files Changed	Coverage Δ
pkg/util/mock.go	0.00% <0.00%> (ø)
pkg/devfile/parser/utils.go	64.35% <5.26%> (-35.65%)	⬇️
pkg/util/git.go	75.79% <10.00%> (ø)
pkg/devfile/parser/parser_mock.go	74.28% <74.28%> (ø)
pkg/devfile/parser/parse.go	64.71% <100.00%> (+4.00%)	⬆️
pkg/util/util.go	37.72% <100.00%> (+1.85%)	⬆️

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[maysunfaisal]

curious why we decided to move here in this pkg.. Seems like they could be in git pkg

[kim-tsao]

Originally, there were duplicates of the until functions in the git package because of cyclic dependencies. It was confusing because some of the parser code was using the same named functions in the util package while others were using the ones from the git package.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kim-tsao, maysunfaisal

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