do not allow vector literals

<andrewrk> tomorrow, end of day, ziglang#3580 will be closed and ziglang#3575 will be
closed, and dimenus's examples will work (except for vector literals which
is not happening, see ziglang#208)

Author: shawnl

src/ir.cpp

@@ -20077,7 +20077,7 @@ static IrInstruction *ir_analyze_instruction_container_init_list(IrAnalyze *ira,
         return ir_analyze_container_init_fields(ira, &instruction->base, container_type, 0, nullptr, result_loc);
     }
 
-    if (container_type->id != ZigTypeIdArray && container_type->id != ZigTypeIdVector) {
+    if (container_type->id != ZigTypeIdArray) {
         ir_add_error_node(ira, instruction->base.source_node,
             buf_sprintf("type '%s' does not support array initialization",
                 buf_ptr(&container_type->name)));

test/stage1/behavior/vector.zig

@@ -233,16 +233,6 @@ test "vector access elements - store" {
     }
 }
 
-test "vector literal" {
-    const S = struct {
-        fn doTheTest() void {
-            var foo = @Vector(4, f32) { 1, 2, 3, 4 };
-        }
-    };
-    S.doTheTest();
-    comptime S.doTheTest();
-}
-
 const Vec4Obj = struct {
     data: @Vector(4, f32),
 };