Make direct tuple assignment work by default in 3.4

[carlosedp]

As described in https://contributors.scala-lang.org/t/make-tuple-unpack-feature-from-source-future-become-default/6238, this PR enables direct tuple assignment in for comprehensions on Scala 3.4.

  // With ZIO assignment separately:
  def y =
    for
      x <- ZIO.fromOption(Some(1, 2))
      (a, b) = x
    yield (a, b)

  println(runZIO(y))

  // With ZIO direct assignment (doesn't work unless using "-source:future"):
  def z =
    for
      (a, b) <- ZIO.fromOption(Some(1, 2))
    yield (a, b)

This behavior was available previously only thru -source:future and better-monadic-for lib.

I might need some guidance to change the test cases to address this.

Addresses #16334

[carlosedp]

CLA signed

[bishabosha]

this is already being done in #16665 admittedly its a bit out of date by now, but some community build projects were blocking

[bishabosha]

im going to close this one in favour of #16665 which I just updated - it has fewer failures in the CI

[carlosedp]

Following the PR over there. Thanks @bishabosha!