### 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)

calltip += " ";
						}
						if (j == completion_argument) {
							calltip += char32_t(0xFFFF);
						}
						if (shader->functions[i].function->arguments[j].is_const) {
							calltip += "const ";
						}
						if (shader->functions[i].function->arguments[j].qualifier != ArgumentQualifier::ARGUMENT_QUALIFIER_IN) {
							if (shader->functions[i].function->arguments[j].qualifier == ArgumentQualifier::ARGUMENT_QUALIFIER_OUT) {
								calltip += "out ";
							} else { 
								calltip += "inout ";
							}
						}
						calltip += get_datatype_name(shader->functions[i].function->arguments[j].type);
						calltip += " ";
						calltip += shader->functions[i].function->arguments[j].name;
						if (shader->functions[i].function->arguments[j].array_size > 0) {
							calltip += "[";
							calltip += itos(shader->functions[i].function->arguments[j].array_size);
							calltip += "]";
						}
						if (j == completion_argument) {
							calltip += char32_t(0xFFFF);
						}
					}
					if (shader->functions[i].function->arguments.size()) {
						calltip += " ";
					}