Backticks on identifiers should be separate tokens

[grynspan]

Description

If I have an expression like so:

let x = y.`z`()

Then the syntax node representing z contains the surrounding backticks. I then need to strip these off manually to get at the actual symbol name so I can use it in other contexts like context.makeUniqueName() or diagnostic messages. These backticks should probably be represented by separate tokens, no?

Steps to Reproduce

No response