Add and fix warnings for unused functions and parameters

Add and fix warnings for unused functions and parameters

These warnings were disabled, and this commit enables them.
It also fixes the many warnings that were present but were silenced. This
includes many unused parameters that could be safely removed. But it also
required marking some parameters as `(void)param;` to indicate to the
compiler that the parameter is infact required. If a function is a stub
function, then instead all of the names of the parameters were removed.

The biggest change is for vk_dispatch_table_helper.h which had stubs for
every device function. Rather than try to mark every parameter as unused
it was simpler to remove all stub functions, which aren't useful for
testing anyhow. Tests should crash rather than silently continue anyhow.