IC: bugfixes (WIP) (#16836)

* minor improvements
* IC: added the required logic for compilerProcs
* LazySym ftw
* we need this testing logic
* reimplement the old way we use for module package creation
* fixes a regression; don't pick module names if you can avoid it

compiler/magicsys.nim

@@ -105,6 +105,8 @@ proc addSonSkipIntLit*(father, son: PType; id: IdGenerator) =
 proc getCompilerProc*(g: ModuleGraph; name: string): PSym =
   let ident = getIdent(g.cache, name)
   result = strTableGet(g.compilerprocs, ident)
+  if result == nil:
+    result = loadCompilerProc(g, name)
 
 proc registerCompilerProc*(g: ModuleGraph; s: PSym) =
   strTableAdd(g.compilerprocs, s)