Dyno: simplify array type creation

[DanilaFe]

Closes https://github.com/Cray/chapel-private/issues/7334, which required resolving:

use ReplicatedDist;

var Space = {1..10};
const ReplicatedSpace = Space dmapped new replicatedDist();
var RA: [ReplicatedSpace] int;

To be merged after #27171. Clean diff: https://github.com/chapel-lang/chapel/pull/27177/files/47946ac16e576a8d92863f8cffb4efebccb2ff96..132e5f2c0931cfbd96003239e9499ab435abbbd3

The dom and eltType fields are required as part of the DSI.

In practice, they are relied on in various method on the _array builtin record:

chapel/modules/internal/ChapelArray.chpl

Lines 832 to 834 in 47946ac

	pragma "no copy return"
	pragma "return not owned"
	proc _dom do return _getDomain(_value.dom);

chapel/modules/internal/ChapelArray.chpl

Lines 819 to 820 in 47946ac

	/* The type of elements contained in the array */
	proc eltType type do return _value.eltType;

So, instead of special casing various well-known array classes to extract their dom and eltType fields, simply adjust the InitResolver code to search for these required fields until they are found.

While there, it seemed easy enough to add errors for when these things are missing.

Reviewed by @arifthpe -- thanks!

Testing

• dyno tests
• test/release/examples/primers/replicated.chpl resolves
• paratest

[DanilaFe]

Older GCCs (7.5) don't accept the cleaner lambda-based approach, so I've backed it out after checking with @arifthpe.