### 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)

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				while (builtin_func_defs[idx].name) {
					if (low_end && builtin_func_defs[idx].high_end) {
						idx++;
						continue;
					}
					matches.insert(String(builtin_func_defs[idx].name), ScriptLanguage::CODE_COMPLETION_KIND_FUNCTION);
					idx++;
				}
			} else { 
				int idx = 0;
				bool low_end = RenderingServer::get_singleton()->is_low_end();
				while (builtin_func_defs[idx].name) {
					if (low_end && builtin_func_defs[idx].high_end) {
						idx++;
						continue;
					}
					if (builtin_func_defs[idx].tag == completion_class) {
						matches.insert(String(builtin_func_defs[idx].name), ScriptLanguage::CODE_COMPLETION_KIND_FUNCTION);
					}
					idx++;
				}
			}
			for (const KeyValue<String, ScriptLanguage::CodeCompletionKind> &E : matches) {
				ScriptLanguage::CodeCompletionOption option(E.key, E.value);
				if (E.value == ScriptLanguage::CODE_COMPLETION_KIND_FUNCTION) {
					option.insert_text += "(";
				}
				r_options->push_back(option);
			}