refactor: Rename a couple of scripts for consistency

[MarlonGamez]

Description
This PR changes a couple script names from using _ to using - for consistency with our others.

• hack/install_golint.sh → hack/install-golint.sh
• hack/new_version.sh → hack/new-version.sh

[codecov]

Codecov Report

Merging #6625 (794f6f2) into main (290280e) will decrease coverage by 0.34%.
The diff coverage is 57.89%.

@@            Coverage Diff             @@
##             main    #6625      +/-   ##
==========================================
- Coverage   70.48%   70.14%   -0.35%     
==========================================
  Files         515      520       +5     
  Lines       23150    23621     +471     
==========================================
+ Hits        16317    16568     +251     
- Misses       5776     5973     +197     
- Partials     1057     1080      +23     

Impacted Files	Coverage Δ
cmd/skaffold/app/cmd/flags.go	89.00% <0.00%> (-1.82%)	⬇️
cmd/skaffold/skaffold.go	0.00% <ø> (ø)
pkg/diag/recommender/container_errors.go	0.00% <0.00%> (ø)
pkg/diag/validator/pod.go	1.32% <0.00%> (ø)
pkg/skaffold/build/buildpacks/logger.go	0.00% <ø> (ø)
pkg/skaffold/build/cluster/logs.go	0.00% <ø> (-16.67%)	⬇️
pkg/skaffold/build/jib/errors.go	48.93% <50.00%> (ø)
cmd/skaffold/app/cmd/cmd.go	70.32% <66.66%> (-0.73%)	⬇️
pkg/diag/validator/resource.go	47.05% <66.66%> (ø)
pkg/skaffold/build/docker/docker.go	86.44% <66.66%> (-2.85%)	⬇️
... and 75 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 81e3fa9...794f6f2. Read the comment docs.