The --log-timestamp=false option does not properly pass down TextFormatter into logrus.TextFormatter

[hrivera-ntap]

Actual behavior
When passing in --log-timestamp=false with either --log-format=text|color set, timestamps still get logged.

Expected behavior
No timestamps should get logged

To Reproduce
Steps to reproduce the behavior:

1. Pass in --log-timestamp=false and --log-format=text and notice timestamps still get logged.

Additional Information

• Kaniko Image v1.23.1

Triage Notes for the Maintainers

The culprit appears to be here:

kaniko/pkg/logging/logging.go

Lines 50 to 59 in 6bea4df

	case FormatText:
	formatter = &logrus.TextFormatter{
	DisableColors: true,
	FullTimestamp: logTimestamp,
	}
	case FormatColor:
	formatter = &logrus.TextFormatter{
	ForceColors: true,
	FullTimestamp: logTimestamp,
	}

This code should be utilizing the DisableTimestamp field instead of the FullTimestamp field in the logrus text formatter. See below:
https://github.com/sirupsen/logrus/blob/dd1b4c2e81afc5c255f216a722b012ed26be57df/text_formatter.go#L48-L50

Description	Yes/No
Please check if this a new feature you are proposing
Please check if the build works in docker but not in kaniko
Please check if this error is seen when you use --cache flag
Please check if your dockerfile is a multistage dockerfile

[silverkorn]

Was the closing of this PR due to something in particular?

[hrivera-ntap]

Was the closing of this PR due to something in particular?

I felt my solution was too simplistic since perhaps the bug has ventured into "it's a feature now" territory.