Fix 'any sword' represents multiple types error

[Fusezion]

Description

This PR aims to fix the if player's tool is any sword comparison no longer working as intended due to a change somewhere in #5815. I am targeting dev/feature if this is incorrect please tell me I'll spend the 10 hours to fix it.

From what I've been able to tell this should of been caused by ItemStack parser not properly checking for ItemType#isAll I've now add a check for it as well removed some finals within the method.

While Pickle wasn't able to replicate it my guess is a change that was needed happened and brought to light this comparison issue.

Screenshot of it working in action, ignore the broadcast, this was a build with my debug messages

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Target Minecraft Versions: any
Requirements: none
Related Issues: #6251

[TheLimeGlass]

I believe the assertion should still remain. Also a test should be added so that assertion can be caught.

[Fusezion]

I believe the assertion should still remain. Also a test should be added so that assertion can be caught.

Assert shouldn't be needed as it should never be met, itemtype should be NonNull.

Added a test however every sword is every sword seems to be saying it's passing when it should be failing as it does on the server running same code.

[Fusezion]

Alright so after a dumb test, something else is going on here.

command /testing:
	trigger:
		if stone sword is any sword: # pass
			broadcast "passed - stone sword is any sword"
		if any sword is any sword: # pass
			broadcast "passed - any sword is any sword"
		if stone sword is every sword: # fail
			broadcast "failed - stone sword is every sword"
		if every sword is every sword: # fail
			broadcast "failed - every sword is every sword"

Note: I do believe every sword is every sword should pass, however if that's the case the error should be handled on it's own comparator not in a parser. Skript doesn't even handle this as an error and should be treated more as a warning if you ask me.

So I'm in favor of changing from Skript.error() to something like Skript.warning()

[Fusezion]

Swapping over to a draft pr for a bit, issue is caused by a custom build for an addon causing itemstack parser to be called needlessly in cases like the issues above. This is also why pickle was not able to replicate. Internally this change is needed, however I want to first find how and why this error happened since the only left overs in my build are classes not finished but also no Skript.register methods being called. There's no startup issues either so it's a far fetch issue.

I work in under 3 hours, so this might not be marked as ready until tomorrow.

[APickledWalrus]

Closing in favor of #6266