Disable Picocli's usage help auto width computation

[sormuras]

Overview

Fixes #3419 by disabling Picocli's usage help auto width computation and tweaking tests.

---

I hereby agree to the terms of the JUnit Contributor License Agreement.

---

Definition of Done

• There are no TODOs left in the code
• Method preconditions are checked and documented in the method's Javadoc
• Coding conventions (e.g. for logging) have been followed
• Change is covered by automated tests including corner cases, errors, and exception handling
• Public API has Javadoc and @API annotations
• Change is documented in the User Guide and Release Notes

[sormuras]

No more stty: /dev/tty: No such device or address, but still a NullPointerException:

    java.lang.NullPointerException: Cannot invoke "org.junit.platform.console.tasks.ConsoleTestExecutor.discover(java.io.PrintWriter)" because the return value of "org.junit.platform.console.tasks.ConsoleTestExecutor$Factory.create(org.junit.platform.console.options.TestDiscoveryOptions, org.junit.platform.console.options.TestConsoleOutputOptions)" is null
    	at org.junit.platform.console.options.DiscoverTestsCommand.execute(DiscoverTestsCommand.java:43)
    	at org.junit.platform.console.options.DiscoverTestsCommand.execute(DiscoverTestsCommand.java:20)
    	at org.junit.platform.console.options.BaseCommand.call(BaseCommand.java:74)
    	at org.junit.platform.console.shadow.picocli.CommandLine.executeUserObject(CommandLine.java:2041)
    	at org.junit.platform.console.shadow.picocli.CommandLine.access$1500(CommandLine.java:148)
    	at org.junit.platform.console.shadow.picocli.CommandLine$RunLast.executeUserObjectOfLastSubcommandWithSameParent(CommandLine.java:2461)
    	at org.junit.platform.console.shadow.picocli.CommandLine$RunLast.handle(CommandLine.java:2453)
    	at org.junit.platform.console.shadow.picocli.CommandLine$RunLast.handle(CommandLine.java:2415)
    	at org.junit.platform.console.shadow.picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:2273)
    	at org.junit.platform.console.shadow.picocli.CommandLine$RunLast.execute(CommandLine.java:2417)
    	at org.junit.platform.console.shadow.picocli.CommandLine.execute(CommandLine.java:2170)
    	at org.junit.platform.console.options.MainCommand.runCommand(MainCommand.java:137)
    	at org.junit.platform.console.options.MainCommand.run(MainCommand.java:125)
    	at org.junit.platform.console.options.CommandFacade.run(CommandFacade.java:36)
    	at org.junit.platform.console.ConsoleLauncher.run(ConsoleLauncher.java:57)
    	at org.junit.platform.console.ConsoleLauncherTests.displayBanner(ConsoleLauncherTests.java:47)
    	...

[sormuras]

NPE was fixed by bc862e0 and following commit(s).