[core] Color is ignored in format expressions when part of a match expression.

[fabian-guerra]

When a format expression containing a text color parameter is included as part of a match expression and set to SymbolStyleLayer.text property is ignored.

Steps to trigger behavior

1. Create the following expression:

NSExpression *expression = [NSExpression expressionWithMGLJSONObject:@[@"match", @[@"-", @2, @1],
                                                                           @1, @[
                                                                           @"format",
                                                                           @[@"get", @"name"], @{},
                                                                           @"\n", @{},
                                                                           @[@"get", @"name"], @{ @"font-scale" : @0.8,
                                                                                                  @"text-color" : @"red",
                                                                                                  @"text-font" : @[@"literal" , @[@"Arial Unicode MS Bold"]] },
                                                                           ], @"Foo"]];

2. Set the expression to a MGLSymbolStyleLayer.text property.

Expected behavior

The text color in the second line should be red.

Actual behavior

The text color in the second line is black.

cc @alexshalamov @chloekraw @julianrex @1ec5

[fabian-guerra]

Fixed in #14259