[Compile Time Constant Extraction] Handle cases where variables with attached result builders are initialized without builder syntax

[venkatesh5789]

There was a bug where in cases such as the following:

public protocol FooProvider {
    @FooBuilder
    static var foos: [Foo] { get }
}

If a struct that implements FooProvider just initialized the array directly, as opposed to using the result builder syntax, then the result was unexpectedly a result builder with empty members.

public struct MyFooProviderInferredWithArrayInitialization: FooProvider {
    public static var foos: [Foo] = [
        Foo(...),
        Foo(...),
    ]
}

This PR now ensures that the .swiftconstvalues will contain the correct Array representation.

{
        "label": "foos",
         .
         .
        .
        "valueKind": "Array",
        "value": [
          {
            "valueKind": "InitCall",
            "value": {
              "type": "ExtractResultBuilders.Foo",
              "arguments": [
                {
                  "label": "name",
                  "type": "Swift.String",
                  "valueKind": "RawLiteral",
                  "value": "MyFooProviderInferredWithArrayReturn.foos.1"
                }
              ]
            }
          },
          {
            "valueKind": "InitCall",
            "value": {
              "type": "ExtractResultBuilders.Foo",
              "arguments": [
                {
                  "label": "name",
                  "type": "Swift.String",
                  "valueKind": "RawLiteral",
                  "value": "MyFooProviderInferredWithArrayInitialization.foos.2"
                }
              ]
            }
          }
        ]
      }

Resolves rdar://144796012

[venkatesh5789]

@swift-ci test