SI-8281 check for unbound placeholder parameters in quasiquote parser
SI-8332 implicit class param unquoting in quasiquotes

A new api that simplifies handling of implicit parameters has been
mistakingly supporting just methods parameters. This commit adds
support for class parameters too.
Merge pull request #3595 from densh/si/8332

SI-8332 implicit class param unquoting in quasiquotes
Merge pull request #3592 from densh/si/8281

SI-8281 check for unbound placeholder parameters in quasiquote parser