Add 'type' advance-debug-var-attr to parser

[NinjaLikesCheez]

This change adds support for the 'type' advanced debug var attribute: https://github.com/swiftlang/swift/blob/main/docs/SIL/Instructions.md#debug-information

[karimhamdanali]

Now that #91 has been merged, can you pull the latest updates from the main branch here for the checks to run properly. Once it passes these checks, I should be able to merge it to the main branch.