Move rest of the warn tests from neg to warn (batch 3) (#19244)

The last batch of tests, move tests other than tests/init/neg and
tests/neg to warn.
PR 4/5 (merge consecutively, per [Nicolas'
suggestion](#18829 (review))

Split up version of #18829

Author: szymon-rd

compiler/test/dotty/tools/dotc/CompilationTests.scala

@@ -217,6 +217,7 @@ class CompilationTests {
     implicit val testGroup: TestGroup = TestGroup("checkInitGlobal")
     val options = defaultOptions.and("-Ysafe-init-global", "-Xfatal-warnings")
     compileFilesInDir("tests/init-global/neg", options, FileFilter.exclude(TestSources.negInitGlobalScala2LibraryTastyBlacklisted)).checkExpectedErrors()
+    compileFilesInDir("tests/init-global/warn", defaultOptions.and("-Ysafe-init-global"), FileFilter.exclude(TestSources.negInitGlobalScala2LibraryTastyBlacklisted)).checkWarnings()
     compileFilesInDir("tests/init-global/pos", options, FileFilter.exclude(TestSources.posInitGlobalScala2LibraryTastyBlacklisted)).checkCompile()
   }
 

tests/init-global/neg/i18628.scala renamed to tests/init-global/warn/i18628.scala

@@ -2,6 +2,6 @@ object Test:
   class Box(val x: Int)
 
   def recur(a: => Box, b: => Box): Int =
-    a.x + recur(a, b) + b.x // error // error
+    a.x + recur(a, b) + b.x // warn // warn
 
   recur(Box(1), Box(2))

tests/init-global/neg/i18628_2.scala renamed to tests/init-global/warn/i18628_2.scala

@@ -2,6 +2,6 @@ object Test:
   class Box(val x: Int)
 
   def recur(a: => Box, b: Box): Int =
-    a.x + recur(a, b) + b.x // error
+    a.x + recur(a, b) + b.x // warn
 
   recur(Box(1), Box(2))

tests/init-global/neg/i18628_3.scala renamed to tests/init-global/warn/i18628_3.scala

@@ -4,6 +4,6 @@ object Test:
   class Box(val x: Int)
 
   def recur(a: => Box, b: => Box): Int =
-    a.x + recur(a: @widen(5), b: @widen(5)) + b.x // error // error
+    a.x + recur(a: @widen(5), b: @widen(5)) + b.x // warn // warn
 
   recur(Box(1), Box(2))

tests/neg-deep-subtype/i4297.scala

@@ -0,0 +1,4 @@
+-- Error: tests/neg-macros/i9570.scala:15:21 ---------------------------------------------------------------------------
+15 |        case '{HCons(_,$t)} => // error
+   |                     ^
+   |             Use of `_` for lambda in quoted pattern. Use explicit lambda instead or use `$_` to match any term.

tests/neg-macros/i9570.check

@@ -12,7 +12,7 @@ object Macros {
     private def sizeImpl(e: Expr[HList], n:Int)(using qctx:Quotes): Expr[Int] = {
       import quotes.reflect.*
       e match {
-        case '{HCons(_,$t)} => // error if run with fatal warinings in BootstrappedOnlyCompilationTests
+        case '{HCons(_,$t)} => // error
           sizeImpl(t,n+1)
         case '{HNil} => Expr(n)
       }

tests/neg-macros/i9570.scala

@@ -0,0 +1,4 @@
+-- Error: tests/neg-macros/macro-deprecation.scala:5:18 ----------------------------------------------------------------
+5 |inline def f = ${ impl } // error
+  |                  ^^^^
+  |                  method impl is deprecated

tests/neg-macros/macro-deprecation.check

@@ -3,4 +3,4 @@
 import scala.quoted.*
 
 inline def f = ${ impl } // error
-@deprecated def impl(using Quotes) = '{1}
+@deprecated def impl(using Quotes) = '{1}