### 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)

for (int i = 0, j = 0; i < count; i += 2, j += 4) {
					if (i < s) {
						gui[j] = r[i] ? 1 : 0;
						gui[j + 1] = r[i + 1] ? 1 : 0;
					} else {
						gui[j] = 0;
						gui[j + 1] = 0;
					}
					gui[j + 2] = 0; 
					gui[j + 3] = 0; 
				}
			} else {
				uint32_t v = value;
				gui[0] = v & 1 ? 1 : 0;
				gui[1] = v & 2 ? 1 : 0;
			}
		} break;
		case ShaderLanguage::TYPE_BVEC3: {
			uint32_t *gui = (uint32_t *)data;
			if (p_array_size > 0) {
				const PackedInt32Array &ba = value;
				int s = ba.size();
				const int *r = ba.ptr();
				int count = 3 * p_array_size;
				for (int i = 0, j = 0; i < count; i += 3, j += 4) {
					if (i < s) {
						gui[j] = r[i] ? 1 : 0;
						gui[j + 1] = r[i + 1] ? 1 : 0;
						gui[j + 2] = r[i + 2] ? 1 : 0;
					} else {