remove the restriction that module names need to be unique per Nimble… (#11064)

* remove the restriction that module names need to be unique per Nimble package

* make tests green again

* use the 'response' linker file also on Unix in order to fix megatest

testament/tester.nim

@@ -320,7 +320,7 @@ proc generatedFile(test: TTest, target: TTarget): string =
     let (_, name, _) = test.name.splitFile
     let ext = targetToExt[target]
     result = nimcacheDir(test.name, test.options, target) /
-             ("compiler_" & name.changeFileExt(ext))
+              name.replace("_", "__").changeFileExt(ext)
 
 proc needsCodegenCheck(spec: TSpec): bool =
   result = spec.maxCodeSize > 0 or spec.ccodeCheck.len > 0