Removed schema references from multiple/single queries

[AureMonke]

1. Removed repetitive withSchemaReferences from queries
2. Fix for labels of some classes are different when loading the same schema using JSON and Incremental locater

[StefanApfel-Bentley]

I'm thinking, shouldn't that rather be internal? We don't want to use it outside of itwinjs.

[StefanApfel-Bentley]

Don't forget to do an extract-api, we changed a few interfaces.

[mergify]

This pull request is now in conflicts. Could you fix it @AureMonke? 🙏
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[rschili]

This can be improved. The "ecNameRegex" is already defined in ECName, it's actually a "replaced character as hex"-regex.
You could just always call ECName.decode, and it would do nothing if the regex doesn't match. No need to duplicate the regex into this method, I think the logic remains the same without the regex.

[rschili]

Edit: Ah now I see why this. You only want to set the label if there are any encoded chars in the name.
In that case we should add a method for it to ECName, so we don't have to copy the regex. Something like ECName.hasEncodedCharacters() : bool