Replace format! with format_args! when `MSRV` >= 1.89.0

[CrazyboyQCD]

As storing format_args!() in a variable is stabilized in 1.89.0, these can be changed.

https://github.com/Traverse-Research/gpu-allocator/blob/673e4ecb503af4188e0ca576acd0dad681f22413/src/allocator/dedicated_block_allocator/mod.rs#L105-L118

https://github.com/Traverse-Research/gpu-allocator/blob/673e4ecb503af4188e0ca576acd0dad681f22413/src/allocator/free_list_allocator/mod.rs#L381-L394