Merge branch 'cleanup-scripts' of github.com:tstromberg/minikube into cleanup-scripts

CI: Use print preserve whitespace between interface names

Fix lint error: File is not `goimports` -ed

Upgrade to golangci-lint v1.21, add dogsled check

fix make test broke by boilerplate

pin go version for boilerplate

The fix change to boilerplate directory but did not change back
to the original directory.

Use pushd and popd to store the directory within the context of
the boilerplate script

Get rid of python scripts in build process

Remove duplicate setting field in config

Added docs for delete --all command

Fix comment for go lint

Make minikube the default target again

Changed the first make target by mistake

Add json output for status

Add note for releasing betas in documentation

Update CHANGELOG for 1.5.0-beta.0

Bump version to 1.5.0-beta.0

Consolidate driver handling code in pkg/minikube/driver

# Conflicts:
#	site/content/en/docs/Reference/Commands/delete.md

Improve kubectl skew check logic