[0.118.x] Remove usage of AtomicU64 in wasmparser
#1413
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Instead substitute this with `AtomicUsize` which panics on overflow to catch any possible issues on 32-bit platforms. This is motivated by rust-lang/rust#120588 which is pulling `wasmparser` into the Rust compiler and `AtomicU64` is not available on all the platforms the compiler itself is built for. I plan on backporting this to the `0.118.x` release track as well which is what's used by the `object` crate currently to avoid the need for a whole bunch of cascading updates.
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This is a backport of #1412 to a newly created
wasmparser-0.118.xbranch.