`getTokensFromNode` is wrong when the ast contains template

[CPunisher]

https://github.com/microsoft/typescript-go/blob/main/internal/ls/signaturehelp.go#L1082

When scanning a template tail, tsgo produces a NoSubstitutionTemplateLiteral from the end backtick of one template to the start backtick of the next template, which regards all code between as template string.

[JoostK]

This function was removed in #1584