Introduce rawMessage key in ignoreErrors

[gharlan]

refs phpstan/phpstan#11178 (comment)

This pull request introduces the rawMessage key in ignoreErrors for non-regex raw error messages:

parameters:
	ignoreErrors:
		-
			rawMessage: 'Raw message without regex escaping etc.'
			identifier: ...

[gharlan]

In a follow-up PR, I would like to change the baseline generation to use rawMessage instead of message.
Can I just change that? Or should it be configurable? Should it be part of bleedingEdge?

[ondrejmirtes]

Thank you!

Yes, the change should be part of bleeding edge. Since both BaselinePhpErrorFormatter and BaselineNeonErrorFormatter are instantiated in AnalyseCommand, you should add a new featureToggles parameter and fetch it there through $container->getParameter().