Completions after `#` include globals

[DanielRosenwasser]

class Person {
    #firstName: string

    constructor(firstName: string) {
        this.#/**/
    }
}

Request completions

Expected: Completion list only includes firstName
Actual: Completion list includes a global completion list.

[andrewbranch]

Related: #36191

I guess this.# doesn’t parse as a PrivateIdentifier, so my fix doesn’t work until there’s at least one more character.