[SIP-71] `into` does not work for inline parameters

[prolativ]

Compiler version

3.7.3-RC1-bin-20250619-b1da8fc-NIGHTLY

Minimized code

import scala.language.experimental.into
import Conversion.into

case class Foo(x: Int)

given Conversion[Int, Foo] = Foo(_)

def takeFoo(f: into[Foo]) = f
inline def inlineTakeFoo(f: into[Foo]) = f
inline def takeInlineFoo(inline f: into[Foo]) = f

def test = 
  val f1 = takeFoo(1)
  val f2 = inlineTakeFoo(1)
  val f3 = takeInlineFoo(1)

Output

(Compiling with -feature flag for more detailed explanation)

[warn] Use of implicit conversion given instance given_Conversion_Int_Foo should be enabled
[warn] by adding the import clause 'import scala.language.implicitConversions'
[warn] or by setting the compiler option -language:implicitConversions.
[warn] See the Scala docs for value scala.language.implicitConversions for a discussion
[warn] why the feature should be explicitly enabled.
[warn]   val f3 = takeInlineFoo(1)
[warn]                          ^

Expectation

The code should compile without a warning. In general, making a method parameter inline should not influence the behaviour of the check for allowed implicit conversions