-encoding is not handled correctly for `.sc` scripts

[Gedochao]

Version(s)
0.1.14

Describe the bug
When running a script with non-UTF-8 encoding, even when the -encoding compiler param is passed, it is not respected.

To Reproduce

▶ cat script.sc
println("€")

▶ iconv -f UTF-8 -t CP1252 script.sc > script-CP-1252.sc   

▶ cat script-CP-1252.sc 
println("�")

▶ scala-cli script.sc
Compiling project (Scala 3.2.0, JVM)
Compiled project (Scala 3.2.0, JVM)
€

▶ scala-cli script-CP-1252.sc 
Compiling project (Scala 3.2.0, JVM)
Compiled project (Scala 3.2.0, JVM)
�

▶ scala-cli script-CP-1252.sc -O -encoding -O cp1252
Compiling project (Scala 3.2.0, JVM)
Compiled project (Scala 3.2.0, JVM)
�

Expected behaviour

▶ scala-cli script-CP-1252.sc -O -encoding -O cp1252
Compiling project (Scala 3.2.0, JVM)
Compiled project (Scala 3.2.0, JVM)
€

Additional context
Discovered when spiking for #1310.
This bug only happens with .sc scripts. .scala files are being handled correctly.

▶ cat Main.scala
object Main extends App {
  println("€")
}

▶ iconv -f UTF-8 -t CP1252 Main.scala > Main-CP-1252.scala

▶ scala-cli Main.scala
Compiling project (Scala 3.2.0, JVM)
Compiled project (Scala 3.2.0, JVM)
€

▶ scala-cli Main-CP-1252.scala -O -encoding -O cp1252
Compiling project (Scala 3.2.0, JVM)
Compiled project (Scala 3.2.0, JVM)
€

[alexarchambault]

In Scala CLI, for now, UTF-8 is assumed almost everywhere, yeah…