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* IC: even if a module is outdated, its dependencies might come from disk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/ic/cbackend.nim

@@ -23,7 +23,7 @@ import std/[packedsets, algorithm]
 import ".."/[ast, options, lineinfos, modulegraphs, cgendata, cgen,
   pathutils, extccomp, msgs]
 
-import packed_ast, to_packed_ast, dce, rodfiles
+import packed_ast, ic, dce, rodfiles
 
 proc unpackTree(g: ModuleGraph; thisModule: int;
                 tree: PackedTree; n: NodePos): PNode =
@@ -83,7 +83,7 @@ proc aliveSymsChanged(config: ConfigRef; position: int; alive: AliveSyms): bool
 proc generateCode*(g: ModuleGraph) =
   ## The single entry point, generate C(++) code for the entire
   ## Nim program aka `ModuleGraph`.
-  initStrTable(g.compilerprocs)
+  resetForBackend(g)
   var alive = computeAliveSyms(g.packed, g.config)
 
   for i in 0..high(g.packed):