Fix some item comparison issues

[bensku]

Description

I fixed a few quirks with item comparisons that caused scripts to remove wrong items in some cases.

• Missing item meta values (e.g. names) of items in inventories are no longer ignored
  • Previously, removing a named item would also remove unnamed items
  • Instead, removing an unnamed item will (as intended) remove those that do have names
• Items in inventories that fail meta checks are no longer promoted as successful matches
  • Promotion used to be done for items without any meta
  • Lack of meta in items is significant, so this was not safe
  • Promotion is still done for aliases that do not have any tags

Please test this PR for regressions before approving. There might be nasty regressions that I didn't think of.

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Target Minecraft Versions: any, but won't solve comparison issues specific to 1.12 and older versions
Requirements: none
Related Issues: #2714

[TheBentoBox]

Looks good to me!

[ShaneBeee]

I tested with a handful of different items, named and unnamed.
This PR appears to successfully resolve the issues as stated.

Looks good to me 👍