remove tests/deps/ (#17132)

* remove tests/deps/

* fix tests

* fix tests/manyloc/keineschweine/lib/zlib_helpers.nim

* fixup

testament/lib/stdtest/specialpaths.nim

@@ -1,6 +1,6 @@
 #[
 todo: move findNimStdLibCompileTime, findNimStdLib here
-xxx: consider moving this to $nim/compiler/relpaths.nim to get relocatable paths
+xxx: factor pending https://github.com/timotheecour/Nim/issues/616
 
 ## note: $lib vs $nim
 note: these can resolve to 3 different paths if running via `nim c --lib:lib foo`,

testament/specs.nim

@@ -103,7 +103,7 @@ type
 
 proc getCmd*(s: TSpec): string =
   if s.cmd.len == 0:
-    result = compilerPrefix & " $target --hints:on -d:testing --nimblePath:tests/deps $options $file"
+    result = compilerPrefix & " $target --hints:on -d:testing --clearNimblePath --nimblePath:build/deps/pkgs $options $file"
   else:
     result = s.cmd