[hal] Merge `Limits` and `Capabilities` as `PhysicalDeviceProperties`

[tangmi]

This PR:

• Merges hal::Limits and hal::Capabilities as PhysicalDeviceProperties.
  • The name was chosen to be more similar to Vulkan.
• Adds properties structs for mesh shaders and descriptor indexing.
• Adds a DescriptorLimits struct to hold descriptor limits and makes the values u32.

PR checklist:

• [x] make succeeds (on *nix)
• [x] make reftests succeeds
• [x] tested examples with the following backends:
  • [x] bench: dx12, vulkan
  • [x] colour-uniform: dx12, vulkan
  • [x] compute: dx12, vulkan
  • [x] quad: dx12, vulkan

[kvark]

@tangmi Let's rebase and merge

[bors[bot]]

Build succeeded:

• Android Stable
• Dependency Check
• iOS Stable
• MacOS Nightly
• MacOS Stable
• Ubuntu Nightly
• Ubuntu Stable
• Web Assembly
• Windows Nightly
• Windows Stable