Add regression test for #10366

Author: griggt

tests/pos/i10366.scala

@@ -0,0 +1,7 @@
+import scala.compiletime.testing._
+
+object Test:
+  implicit class ShouldWrapper(lhs: Boolean):
+    def shouldBe(rhs: Boolean): Unit = ???
+
+  typeChecks("class Bar") shouldBe true