perf(treesitter): remove unnecessary foldexpr loop

Instead of looping over all captured nodes, just take the end range from
the last node in the list. This uses the fact that nodes returned by
iter_matches are ordered by their range (earlier to later).

test/functional/treesitter/query_spec.lua

@@ -249,6 +249,61 @@ void ui_refresh(void)
     }, res)
   end)
 
+  it('returns quantified matches in order of range #29344', function()
+    insert([[
+    int main() {
+      int a, b, c, d, e, f, g, h, i;
+      a = MIN(0, 1);
+      b = MIN(0, 1);
+      c = MIN(0, 1);
+      d = MIN(0, 1);
+      e = MIN(0, 1);
+      f = MIN(0, 1);
+      g = MIN(0, 1);
+      h = MIN(0, 1);
+      i = MIN(0, 1);
+    }
+    ]])
+
+    local res = exec_lua(
+      [[
+        cquery = vim.treesitter.query.parse("c", ...)
+        parser = vim.treesitter.get_parser(0, "c")
+        tree = parser:parse()[1]
+        res = {}
+        for pattern, match in cquery:iter_matches(tree:root(), 0, 7, 14, { all = true }) do
+          -- can't transmit node over RPC. just check the name and range
+          local mrepr = {}
+          for cid, nodes in pairs(match) do
+            for _, node in ipairs(nodes) do
+              table.insert(mrepr, { '@' .. cquery.captures[cid], node:type(), node:range() })
+            end
+          end
+          table.insert(res, {pattern, mrepr})
+        end
+        return res
+      ]],
+      '(expression_statement (assignment_expression (call_expression)))+ @funccall'
+    )
+
+    eq({
+      {
+        1,
+        {
+          { '@funccall', 'expression_statement', 2, 2, 2, 16 },
+          { '@funccall', 'expression_statement', 3, 2, 3, 16 },
+          { '@funccall', 'expression_statement', 4, 2, 4, 16 },
+          { '@funccall', 'expression_statement', 5, 2, 5, 16 },
+          { '@funccall', 'expression_statement', 6, 2, 6, 16 },
+          { '@funccall', 'expression_statement', 7, 2, 7, 16 },
+          { '@funccall', 'expression_statement', 8, 2, 8, 16 },
+          { '@funccall', 'expression_statement', 9, 2, 9, 16 },
+          { '@funccall', 'expression_statement', 10, 2, 10, 16 },
+        },
+      },
+    }, res)
+  end)
+
   it('can match special regex characters like \\ * + ( with `vim-match?`', function()
     insert('char* astring = "\\n"; (1 + 1) * 2 != 2;')