rename some wiggle tests to reflect new witx ast names

arrays are now lists
structs are now records
unions are now variants

this ruins some of my union puns, oh well

crates/wiggle/tests/lists.witx

@@ -0,0 +1,36 @@
+(use "errno.witx")
+(use "excuse.witx")
+
+(typename $const_excuse_array (list (@witx const_pointer $excuse)))
+(typename $excuse_array (list (@witx pointer $excuse)))
+
+(module $lists
+  (@interface func (export "reduce_excuses")
+    (param $excuses $const_excuse_array)
+    (result $error (expected $excuse (error $errno)))
+  )
+  (@interface func (export "populate_excuses")
+    (param $excuses $excuse_array)
+    (result $error (expected (error $errno)))
+  )
+)
+
+(typename $pair_ints
+  (record
+    (field $first s32)
+    (field $second s32)))
+
+(typename $s32 s32)
+
+(module $array_traversal
+  (@interface func (export "sum_of_element")
+    (param $elements (list $pair_ints))
+    (param $index (@witx usize))
+    (result $error (expected $s32 (error $errno))))
+
+  (@interface func (export "sum_of_elements")
+    (param $elements (list $pair_ints))
+    (param $start (@witx usize))
+    (param $end (@witx usize))
+    (result $error (expected $s32 (error $errno))))
+)