vk::dbg::ID is a strongly-typed identifier backed by an int.
ID is used to prevent implicit casts between idenfitifers of different T types.

Bug: b/145351270
Change-Id: Ia51ee8cca19eaa86cab4e009340fdcf9072360e5
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/38891Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Ben Clayton <bclayton@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>