Add two futures for issues I encountered with arrays of ranges (#26619)

[minor new tests, not reviewed]

One was while trying to sort the array, the other was trying to use it
in a zippered context

Relates to issue #26616 and #26618

Verified a fresh checkout of the futures

test/library/standard/Sort/correctness/arrayOfRanges.bad

@@ -0,0 +1,9 @@
+$CHPL_HOME/modules/standard/Sort.chpl:nnnn: In function 'compareByPart':
+$CHPL_HOME/modules/standard/Sort.chpl:nnnn: error: illegal tuple variable declaration with non-tuple initializer
+  $CHPL_HOME/modules/standard/Sort.chpl:nnnn: called as compareByPart(a: range(int(64),both,one), b: range(int(64),both,one), comparator: defaultComparator)
+  within internal functions (use --print-callstack-on-error to see)
+  $CHPL_HOME/modules/standard/Sort.chpl:nnnn: called as shellSortMoveElts(Data: [domain(1,int(64),one)] range(int(64),both,one), comparator: defaultComparator, start: int(64), end: int(64)) from function 'msbRadixSort'
+  $CHPL_HOME/modules/standard/Sort.chpl:nnnn: called as msbRadixSort(A: [domain(1,int(64),one)] range(int(64),both,one), start_n: int(64), end_n: int(64), criterion: defaultComparator, startbit: int(64), endbit: int(64), settings: MSBRadixSortSettings(5,false,false)) from function 'msbRadixSort'
+  $CHPL_HOME/modules/standard/Sort.chpl:nnnn: called as msbRadixSort(Data: [domain(1,int(64),one)] range(int(64),both,one), comparator: defaultComparator, region: range(int(64),both,one)) from function 'unstableSort'
+  $CHPL_HOME/modules/standard/Sort.chpl:nnnn: called as unstableSort(x: [domain(1,int(64),one)] range(int(64),both,one), comparator: defaultComparator, region: range(int(64),both,one)) from function 'sort'
+  arrayOfRanges.chpl:8: called as sort(x: [domain(1,int(64),one)] range(int(64),both,one), comparator: defaultComparator, param stable = false)

test/library/standard/Sort/correctness/arrayOfRanges.chpl

@@ -0,0 +1,10 @@
+// Motivated by wanting to sort the ranges returned by the range leader iterator
+use Sort;
+
+var arr: [0..4] range = [1..2, 3..4, 6..7, 5..5, -1..0];
+
+writeln(arr);
+
+sort(arr);
+
+writeln(arr);

test/library/standard/Sort/correctness/arrayOfRanges.future

@@ -0,0 +1,2 @@
+unimplemented feature: sorting arrays of ranges
+#26616

test/library/standard/Sort/correctness/arrayOfRanges.good

@@ -0,0 +1 @@
+-1..0 1..2 3..4 5..5 6..7

test/library/standard/Sort/correctness/arrayOfRanges.prediff

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+$CHPL_HOME/util/test/prediff-obscure-module-linenos $@

test/types/range/arrayOfRanges.bad

@@ -0,0 +1 @@
+arrayOfRanges.chpl:10: error: Heterogeneous tuples don't support this style of loop yet

test/types/range/arrayOfRanges.chpl

@@ -0,0 +1,19 @@
+// Motivated by getting the subranges from the range leader iterator
+var arr: [0..4] range = [1..2, 3..4, 6..7, 5..5, -1..0];
+
+writeln(arr);
+
+var arr2: [arr.domain] int;
+
+// I wanted to store the size of each of the ranges into a separate array, but
+// writing it like this didn't work.
+forall (i, r) in (arr.domain, arr) {
+  arr2[i] = r.size;
+}
+/* Had to use this instead:
+for i in arr.domain {
+  arr2[i] = arr[i].size;
+}
+*/
+
+writeln(arr2);

test/types/range/arrayOfRanges.future

@@ -0,0 +1,2 @@
+unimplemented feature: zippering an array of ranges with something else
+#26618

test/types/range/arrayOfRanges.good

@@ -0,0 +1,2 @@
+1..2 3..4 6..7 5..5 -1..0
+2 2 2 1 2