Inconsistent shader uniform name capitalization

### Tested versions

4.6 stable

### System information

Godot v4.6.stable - Windows 10 (build 19045) - Single-window, 1 monitor - Vulkan (Forward+) - dedicated AMD Radeon RX 580 2048SP (Advanced Micro Devices, Inc.; 31.0.21923.1000) - Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz (4 threads) - 15.96 GiB memory

### Issue description

Shader uniforms with similar naming convention results in different capitalization in the inspector.

For example

```
uniform bool project_xy = true;
uniform bool project_xz = true;
uniform bool project_zy = true;
```

results in

The Y for ZY isn't capitalized.

Also group uniforms names don't follow the same convention as uniforms.

```
group_uniforms UV_Controls.uv_Select;
uniform int uv_Select : hint_enum("UV1, UV2") = 0;
```

Same naming convention but the subgroup doesn't capitalize.

### Steps to reproduce

Test different naming conventions with shader uniforms and uniform groups

### Minimal reproduction project (MRP)

.