Merge tests into a larger file (part 5 of ∞) (#9368)

* merge magics

* merge metatype tests

* merge method tests

* merge objects tests

* change `import future` to `import sugar`

Nim in Action tests are left with `import future`, to ensure compatibility.

* merge overload tests

* merge proc tests

* merge procvar tests

* merge range tests

* merge seq tests

* merge sets tests

* remove wrong assert from `tsets3`

* fix `jsTests`

* better fix

tests/procvar/tprocvarmismatch.nim

@@ -0,0 +1,18 @@
+discard """
+  errormsg: "type mismatch"
+  line: 17
+  file: "tprocvarmismatch.nim"
+"""
+
+type
+  TCallback = proc (a, b: int)
+
+proc huh(x, y: var int) =
+  x = 0
+  y = x+1
+
+proc so(c: TCallback) =
+  c(2, 4)
+
+so(huh)
+