fix: credential not needed to update,version and help

[dmicheneau]

Description of your changes

If you submit change in the provider code, please make sure to:

• If Needed add a changelog file
• Write or modify coverage tests
• Run make generate to ensure the doc was updated properly

How has this code been coverage and tested

go test -coverprofile=coverage.out ./cmd/... && go tool cover -func=coverage.out

coverage: 55.5% of statements
ok      github.com/orange-cloudavenue/cloudavenue-cli/cmd       157.021s        coverage: 55.5% of statements
github.com/orange-cloudavenue/cloudavenue-cli/cmd/add.go:27:            init                    65.2%
github.com/orange-cloudavenue/cloudavenue-cli/cmd/del.go:31:            init                    100.0%
github.com/orange-cloudavenue/cloudavenue-cli/cmd/get.go:45:            init                    100.0%
github.com/orange-cloudavenue/cloudavenue-cli/cmd/root.go:16:           Execute                 50.0%
github.com/orange-cloudavenue/cloudavenue-cli/cmd/root.go:31:           NewRootCmd              100.0%
github.com/orange-cloudavenue/cloudavenue-cli/cmd/root.go:36:           init                    100.0%
github.com/orange-cloudavenue/cloudavenue-cli/cmd/root_client.go:16:    initConfig              47.8%
github.com/orange-cloudavenue/cloudavenue-cli/cmd/root_client.go:60:    initClient              75.0%
github.com/orange-cloudavenue/cloudavenue-cli/cmd/root_global.go:67:    stringToTypeFormat      75.0%
github.com/orange-cloudavenue/cloudavenue-cli/cmd/root_global.go:79:    timeTrack               100.0%
github.com/orange-cloudavenue/cloudavenue-cli/cmd/update.go:17:         init                    100.0%
github.com/orange-cloudavenue/cloudavenue-cli/cmd/version.go:5:         init                    100.0%
github.com/orange-cloudavenue/cloudavenue-cli/cmd/version.go:10:        versionCmd              100.0%
total:                                                                  (statements)            71.9%