Add support for podman v2 to podman-env command

[afbjorklund]

Podman v1 (like 1.9.3) uses the varlink bridge,
while podman v2 (like 2.1.x) uses a REST API.

Both are using ssh for their transport, but the
environment variables exported are different.

Not using sudo anymore, so user needs root access.

See #8596 for how to set that up for the "docker" user

Tested OK with 1.9.3 and 2.1.1 minikube profiles.

But don't recommend using podman 2.0.x (at all)

[TravisBuddy]

Travis tests have failed

Hey @afbjorklund,
Please read the following log in order to understand the failure reason.
It'll be awesome if you fix what's wrong and commit the changes.

1st Build

View build log

make test

PATH="/home/travis/gopath/bin:/home/travis/.gimme/versions/go1.15.2.linux.amd64/bin:/home/travis/bin:/home/travis/bin:/home/travis/.local/bin:/usr/local/lib/jvm/openjdk11/bin:/opt/pyenv/shims:/home/travis/.phpenv/shims:/home/travis/perl5/perlbrew/bin:/home/travis/.nvm/versions/node/v8.12.0/bin:/home/travis/.rvm/gems/ruby-2.5.3/bin:/home/travis/.rvm/gems/ruby-2.5.3@global/bin:/home/travis/.rvm/rubies/ruby-2.5.3/bin:/home/travis/gopath/bin:/home/travis/.gimme/versions/go1.11.1.linux.amd64/bin:/usr/local/maven-3.6.3/bin:/usr/local/cmake-3.12.4/bin:/usr/local/clang-7.0.0/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin:/home/travis/.rvm/bin:/home/travis/.phpenv/bin:/opt/pyenv/bin:/home/travis/.yarn/bin:/home/travis/gopath/bin" go-bindata -nomemcopy -o pkg/minikube/assets/assets.go -pkg assets deploy/addons/...
gofmt -s -w pkg/minikube/assets/assets.go
PATH="/home/travis/gopath/bin:/home/travis/.gimme/versions/go1.15.2.linux.amd64/bin:/home/travis/bin:/home/travis/bin:/home/travis/.local/bin:/usr/local/lib/jvm/openjdk11/bin:/opt/pyenv/shims:/home/travis/.phpenv/shims:/home/travis/perl5/perlbrew/bin:/home/travis/.nvm/versions/node/v8.12.0/bin:/home/travis/.rvm/gems/ruby-2.5.3/bin:/home/travis/.rvm/gems/ruby-2.5.3@global/bin:/home/travis/.rvm/rubies/ruby-2.5.3/bin:/home/travis/gopath/bin:/home/travis/.gimme/versions/go1.11.1.linux.amd64/bin:/usr/local/maven-3.6.3/bin:/usr/local/cmake-3.12.4/bin:/usr/local/clang-7.0.0/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin:/home/travis/.rvm/bin:/home/travis/.phpenv/bin:/opt/pyenv/bin:/home/travis/.yarn/bin:/home/travis/gopath/bin" go-bindata -nomemcopy -o pkg/minikube/translate/translations.go -pkg translate translations/...
gofmt -s -w pkg/minikube/translate/translations.go
MINIKUBE_LDFLAGS="-X k8s.io/minikube/pkg/version.version=v1.14.0 -X k8s.io/minikube/pkg/version.isoVersion=v1.14.0 -X k8s.io/minikube/pkg/version.isoPath=minikube/iso -X k8s.io/minikube/pkg/version.gitCommitID="8174beaaeb045587a59df28259be970d1f4b229b" -X k8s.io/minikube/pkg/version.storageProvisionerVersion=v3" ./test.sh
= make lint =============================================================
golangci/golangci-lint info checking GitHub for tag 'v1.30.0'
golangci/golangci-lint crit unable to find 'v1.30.0' - use 'latest' or see https://github.com/golangci/golangci-lint/releases for details
Makefile:416: recipe for target 'out/linters/golangci-lint-v1.30.0' failed
make[1]: *** [out/linters/golangci-lint-v1.30.0] Error 1
= go mod ================================================================
ok
= boilerplate ===========================================================
ok
Makefile:315: recipe for target 'test' failed
make: *** [test] Error 4

TravisBuddy Request Identifier: 75c013a0-1519-11eb-aff7-dd8cbeb067cc

[afbjorklund]

Dear @TravisBuddy it is just a Travis flake

[codecov-io]

Codecov Report

Merging #9535 into master will increase coverage by 0.09%.
The diff coverage is 64.91%.

@@            Coverage Diff             @@
##           master    #9535      +/-   ##
==========================================
+ Coverage   29.11%   29.21%   +0.09%     
==========================================
  Files         172      172              
  Lines       10461    10556      +95     
==========================================
+ Hits         3046     3084      +38     
- Misses       6990     7047      +57     
  Partials      425      425              

Impacted Files	Coverage Δ
cmd/minikube/cmd/podman-env.go	45.90% <64.91%> (+12.56%)	⬆️
cmd/minikube/cmd/root.go	43.57% <0.00%> (-3.72%)	⬇️
pkg/minikube/machine/stop.go	27.77% <0.00%> (-0.80%)	⬇️
cmd/minikube/cmd/config/profile_list.go	2.38% <0.00%> (-0.19%)	⬇️
cmd/minikube/cmd/start_flags.go	47.04% <0.00%> (ø)
pkg/drivers/kic/oci/network_create.go	0.00% <0.00%> (ø)
pkg/minikube/out/register/register.go	79.48% <0.00%> (ø)
cmd/minikube/cmd/stop.go	5.76% <0.00%> (+1.76%)	⬆️
cmd/minikube/cmd/unpause.go	7.50% <0.00%> (+2.23%)	⬆️
cmd/minikube/cmd/pause.go	8.57% <0.00%> (+2.51%)	⬆️
... and 1 more

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: afbjorklund, medyagh

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• OWNERS [afbjorklund,medyagh]

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