Remote Debug is available for Web exports even if there's no debug template available

[adamscott]

Tested versions

Reproducible since the merge of #92163

System information

Godot v4.3.beta (1e8e9f4) - macOS 14.5.0 - Vulkan (Forward+) - integrated Apple M2 - Apple M2 (8 Threads)

Issue description

The Remote Debug icon is lit even if there's no debug template. As Remote Debug uses debug templates, it shouldn't be active.

Steps to reproduce

1. Remove any export template from your editor settings directory
2. Make sure that there's only the release build available in the custom export templates field
3. See that the Remote Debug icon is available

Minimal reproduction project (MRP)

n/a