### 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)

if (op->op == OP_EMPTY) {
					is_var_init = true;
					is_condition = true;
				}
			}
			p_block->statements.push_back(expr);
			tk = _get_token();
			if (p_block->block_type == BlockNode::BLOCK_TYPE_FOR_CONDITION) {
				if (tk.type == TK_COMMA) {
					if (!is_condition) {
						_set_error(RTR("The middle expression is expected to be a boolean operator."));
						return ERR_PARSE_ERROR;
					}
					continue;
				}
				if (tk.type != TK_SEMICOLON) {
					_set_expected_error(",", ";");
					return ERR_PARSE_ERROR;
				}
			} else if (p_block->block_type == BlockNode::BLOCK_TYPE_FOR_EXPRESSION) {
				if (tk.type == TK_COMMA) {
					continue;
				}
				if (tk.type != TK_PARENTHESIS_CLOSE) {
					_set_expected_error(",", ")");
					return ERR_PARSE_ERROR;
				}
			} else if (tk.type != TK_SEMICOLON) {
				_set_expected_error(";");
				return ERR_PARSE_ERROR;