IC: green tests (#17311)

* IC: renamed to_packed_ast module to ic module

* IC: don't store the --forceBuild flag, makes it easier to test

* IC: enable hello world test

* Codegen: refactorings for IC; changed the name mangling algorithm

* fixed the HCR regressions

* life is too short for HCR

* tconvexhull is now allowed to use deepCopy

* IC exposed a stdlib bug, required a refactoring

* codegen: code cleanups

* IC: even if a module is outdated, its dependencies might come from disk

* IC: progress

* IC: better name mangling, module IDs are not stable

* IC: another refactoring helping with --ic:on --gc:arc

* disable arraymancer on Windows for the time being

* disable arraymancer altogether

* IC: make basic test work with 'nim cpp'

* IC: progress on --ic:on --gc:arc

* wip; name mangling for type info

compiler/lineinfos.nim

@@ -59,7 +59,10 @@ type
     warnLockLevel = "LockLevel", warnResultShadowed = "ResultShadowed",
     warnInconsistentSpacing = "Spacing",  warnCaseTransition = "CaseTransition",
     warnCycleCreated = "CycleCreated", warnObservableStores = "ObservableStores",
-    warnUser = "User", warnStrictNotNil = "StrictNotNil",
+    warnStrictNotNil = "StrictNotNil",
+    warnCannotOpen = "CannotOpen",
+    warnFileChanged = "FileChanged",
+    warnUser = "User",
 
     hintSuccess = "Success", hintSuccessX = "SuccessX", hintCC = "CC",
     hintLineTooLong = "LineTooLong", hintXDeclaredButNotUsed = "XDeclaredButNotUsed",
@@ -133,8 +136,10 @@ const
     warnCaseTransition: "Potential object case transition, instantiate new object instead",
     warnCycleCreated: "$1",
     warnObservableStores: "observable stores to '$1'",
-    warnUser: "$1",
     warnStrictNotNil: "$1",
+    warnCannotOpen: "cannot open: $1",
+    warnFileChanged: "file changed: $1",
+    warnUser: "$1",
     hintSuccess: "operation successful: $#",
     # keep in sync with `testament.isSuccess`
     hintSuccessX: "${loc} lines; ${sec}s; $mem; $build build; proj: $project; out: $output",