use git checkout instead of switch

[mike-hoang]

What does this PR do?:

• Uses git checkout instead of git switch to change revisions.
• Attempt resource download only if uri is a supported git repo.

Which issue(s) this PR fixes:

devfile/api#1119

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: 20.00% and project coverage change: +0.11 🎉

Comparison is base (d32bcd6) 59.62% compared to head (ce6a7d5) 59.73%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #173      +/-   ##
==========================================
+ Coverage   59.62%   59.73%   +0.11%     
==========================================
  Files          41       41              
  Lines        5119     5119              
==========================================
+ Hits         3052     3058       +6     
+ Misses       1873     1866       -7     
- Partials      194      195       +1     

Impacted Files	Coverage Δ
pkg/devfile/parser/parse.go	60.80% <0.00%> (ø)
pkg/git/mock.go	0.00% <0.00%> (ø)
pkg/git/git.go	82.85% <100.00%> (+2.44%)	⬆️

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.

[michael-valdron]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: michael-valdron, mike-hoang
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