Support regex ignorePaths in immutability check

[johnste]

This is somewhat related to #2553

I have an issue where a path I want to ignore in immutableCheck is somewhat dynamic, so I'd like to use a Regex to match the paths.

However, this doesn't fully work, as trackProperties treats ignorePaths as if they are all string instances

redux-toolkit/packages/toolkit/src/immutableStateInvariantMiddleware.ts

Line 49 in 6600116

if (ignorePaths.length && ignorePaths.indexOf(childPath) !== -1) {