### 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 (error) {
							if (hexa_found) {
								return _make_token(TK_ERROR, "Invalid (hexadecimal) numeric constant");
							}
							if (period_found || exponent_found || float_suffix_found) {
								return _make_token(TK_ERROR, "Invalid (float) numeric constant");
							}
							if (uint_suffix_found) {
								return _make_token(TK_ERROR, "Invalid (unsigned integer) numeric constant");
							}
							return _make_token(TK_ERROR, "Invalid (integer) numeric constant");
						}
						str += symbol;
						i++;
					}
					char32_t last_char = str[str.length() - 1];
					if (hexa_found) { 
						if (str.size() > 11 || !str.is_valid_hex_number(true)) { 
							return _make_token(TK_ERROR, "Invalid (hexadecimal) numeric constant");
						}
					} else if (period_found || exponent_found || float_suffix_found) { 
						if (exponent_found && (!digit_after_exp || (!is_digit(last_char) && last_char != 'f'))) { 
							return _make_token(TK_ERROR, "Invalid (float) numeric constant");
						}
						if (period_found) {
							if (float_suffix_found) {
								
								if (last_char != 'f') {
									return _make_token(TK_ERROR, "Invalid (float) numeric constant");
								}