test: preventing dubios ownership repository error on git unit tests

[jrangelramos]

Changes

This chages are meant to preventing dubios ownership repository error on git unit tests (running on Prow/CI)

Sample error observed on midstream CI

--- FAIL: TestTemplates_Remote (0.01s)
    templates_test.go:184: failed to get repository from URI ("http://127.0.0.1:38599/repository.git"): failed to clone repository: unexpected client error: unexpected requesting "http://127.0.0.1:38599/repository.git/info/refs?service=git-upload-pack" status code: 500
fatal: detected dubious ownership in repository at '/go/src/github.com/openshift-knative/kn-plugin-func/pkg/functions/testdata/repository.git'
To add an exception for this directory, call:

	git config --global --add safe.directory /go/src/github.com/openshift-knative/kn-plugin-func/pkg/functions/testdata/repository.git

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jrangelramos

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[matejvasek]

/lgtm

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 67.04%. Comparing base (81169a4) to head (4ec6f48).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/testing/testing.go	50.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2499      +/-   ##
==========================================
+ Coverage   61.54%   67.04%   +5.49%     
==========================================
  Files         129      129              
  Lines       15344    11938    -3406     
==========================================
- Hits         9444     8004    -1440     
+ Misses       4973     2968    -2005     
- Partials      927      966      +39     

Flag	Coverage Δ
e2e-test	36.60% <ø> (ø)
e2e-test-oncluster	33.41% <ø> (ø)
e2e-test-oncluster-runtime	29.45% <ø> (?)
e2e-test-runtime-go	26.61% <ø> (?)
e2e-test-runtime-node	26.00% <ø> (?)
e2e-test-runtime-python	26.00% <ø> (?)
e2e-test-runtime-quarkus	26.09% <ø> (?)
e2e-test-runtime-rust	25.14% <ø> (?)
e2e-test-runtime-springboot	25.15% <ø> (?)
e2e-test-runtime-typescript	26.08% <ø> (?)
integration-tests	53.07% <50.00%> (+2.33%)	⬆️
unit-tests	51.28% <50.00%> (?)
unit-tests-macos-latest	?
unit-tests-ubuntu-latest	?
unit-tests-windows-latest	?

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[matejvasek]

/test unit-tests