### Godot version

v4.1.dev.custom_build.a7276f1ce

### System information

Win10, AMD 2600, GeForce GTX 1060, Vulkan API 1.3.205

### Issue description

I can't get correct color data from an array of source_color type.
The color data is saved as **Color** in the file:
`shader_parameter/palette = [Color (1, 0, 0, 1), Color (0, 1, 0, 1), Color (0, 0, 1, 1)]`
Shouldn't it be saved as PackedColorArray?


### Steps to reproduce

1.Declare an array of source_color type.
2.Set colors.

### Minimal reproduction project

[shadertest.zip](https://github.com/godotengine/godot/files/11246504/shadertest.zip)

_set_tkpos(pos);
				return OK;
			}
			if (!p_block || (p_block->block_type != BlockNode::BLOCK_TYPE_SWITCH)) {
				_set_error(vformat(RTR("'%s' must be placed within a '%s' block."), "default", "switch"));
				return ERR_PARSE_ERROR;
			}
			tk = _get_token();
			if (tk.type != TK_COLON) {
				_set_expected_error(":");
				return ERR_PARSE_ERROR;
			}
			ControlFlowNode *cf = alloc_node<ControlFlowNode>();
			cf->flow_op = FLOW_OP_DEFAULT;
			BlockNode *default_block = alloc_node<BlockNode>();
			default_block->block_type = BlockNode::BLOCK_TYPE_DEFAULT;
			default_block->parent_block = p_block;
			cf->blocks.push_back(default_block);
			p_block->statements.push_back(cf);
			Error err = _parse_block(default_block, p_function_info, false, true, false);
			if (err) {
				return err;
			}
			return OK;
		} else if (tk.type == TK_CF_DO || tk.type == TK_CF_WHILE) {
			
			
			bool is_do = tk.type == TK_CF_DO;
			BlockNode *do_block = nullptr;
			if (is_do) {