### 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)

} break;
				case TYPE_BVEC3:
				case TYPE_IVEC3:
				case TYPE_UVEC3:
				case TYPE_VEC3: {
					limit = 3;
				} break;
				case TYPE_BVEC4:
				case TYPE_IVEC4:
				case TYPE_UVEC4:
				case TYPE_VEC4: {
					limit = 4;
				} break;
				default: {
				}
			}
			for (int i = 0; i < limit; i++) {
				r_options->push_back(ScriptLanguage::CodeCompletionOption(String::chr(colv[i]), ScriptLanguage::CODE_COMPLETION_KIND_PLAIN_TEXT));
				r_options->push_back(ScriptLanguage::CodeCompletionOption(String::chr(coordv[i]), ScriptLanguage::CODE_COMPLETION_KIND_PLAIN_TEXT));
				r_options->push_back(ScriptLanguage::CodeCompletionOption(String::chr(coordt[i]), ScriptLanguage::CODE_COMPLETION_KIND_PLAIN_TEXT));
			}
		} break;
		case COMPLETION_HINT: {
			if (completion_base == DataType::TYPE_VEC3 || completion_base == DataType::TYPE_VEC4) {
				if (current_uniform_hint == ShaderNode::Uniform::HINT_NONE) {
					ScriptLanguage::CodeCompletionOption option("source_color", ScriptLanguage::CODE_COMPLETION_KIND_PLAIN_TEXT);
					r_options->push_back(option);
				}
			} else if ((completion_base == DataType::TYPE_INT || completion_base == DataType::TYPE_FLOAT) && !completion_base_array) {
				if (current_uniform_hint == ShaderNode::Uniform::HINT_NONE) {