Move all macro tests to macro test folders (#17990)

We should only execute macro tests on the bootstrap compiler.

Also, remove`scala.quoted` imports in tests that do not use it, such as
`inline` tests.

Author: nicolasstucki

tests/neg/higher-order-quoted-expressions.scala renamed to tests/neg-macros/higher-order-quoted-expressions.scala

@@ -1,4 +1,4 @@
--- [E044] Cyclic Error: tests/neg/i14772.scala:7:7 ---------------------------------------------------------------------
+-- [E044] Cyclic Error: tests/neg-macros/i14772.scala:7:7 --------------------------------------------------------------
 7 |    foo(a)    // error
   |       ^
   |       Overloaded or recursive method impl needs return type

tests/neg/i12019.scala renamed to tests/neg-macros/i12019.scala

@@ -1,34 +1,34 @@
--- Error: tests/neg/i15009a.scala:4:9 ----------------------------------------------------------------------------------
+-- Error: tests/neg-macros/i15009a.scala:4:9 ---------------------------------------------------------------------------
 4 |  '[List[${Type.of[Int]}]] // error
   |         ^^^^^^^^^^^^^^^
   |         Type splicing with `$` in quotes not supported anymore
   |
   |         Hint: To use a given Type[T] in a quote just write T directly
--- Error: tests/neg/i15009a.scala:7:16 ---------------------------------------------------------------------------------
+-- Error: tests/neg-macros/i15009a.scala:7:16 --------------------------------------------------------------------------
 7 |    case '[List[$a]] => // error
   |                ^^
   |                Type splicing with `$` in quotes not supported anymore
   |
   |                Hint: Use lower cased variable name without the `$` instead
--- Error: tests/neg/i15009a.scala:10:16 --------------------------------------------------------------------------------
+-- Error: tests/neg-macros/i15009a.scala:10:16 -------------------------------------------------------------------------
 10 |  '{ List.empty[$int] } // error
    |                ^^^^
    |                Type splicing with `$` in quotes not supported anymore
    |
    |                Hint: To use a given Type[T] in a quote just write T directly
--- Error: tests/neg/i15009a.scala:11:9 ---------------------------------------------------------------------------------
+-- Error: tests/neg-macros/i15009a.scala:11:9 --------------------------------------------------------------------------
 11 |  val t: ${int} = ??? // error
    |         ^^^^^^
    |         Type splicing with `$` in quotes not supported anymore
    |
    |         Hint: To use a given Type[T] in a quote just write T directly
--- Error: tests/neg/i15009a.scala:3:2 ----------------------------------------------------------------------------------
+-- Error: tests/neg-macros/i15009a.scala:3:2 ---------------------------------------------------------------------------
 3 |  '[Int] // error
   |  ^^^^^^
   |  Quoted types `'[..]` can only be used in patterns.
   |
   |  Hint: To get a scala.quoted.Type[T] use scala.quoted.Type.of[T] instead.
--- [E006] Not Found Error: tests/neg/i15009a.scala:12:2 ----------------------------------------------------------------
+-- [E006] Not Found Error: tests/neg-macros/i15009a.scala:12:2 ---------------------------------------------------------
 12 |  $int // error: Not found: $int
    |  ^^^^
    |  Not found: $int