spirv: update failing / passing tests

Some tests are now failing due to debug info changes, some tests
now pass due to improved compiler functionality.

test/behavior/src.zig

@@ -33,8 +33,6 @@ test "@src used as a comptime parameter" {
 }
 
 test "@src in tuple passed to anytype function" {
-    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
-
     const S = struct {
         fn Foo(a: anytype) u32 {
             return a[0].line;