rusticl/bindgen: Use `allowlist-*` instead of `whitelist-*` switches
bindgen 0.58.0 deprecated the whitelist-*
switches in favor of the new allowlist-*
switches.
Currently rusticl uses a mixture of both.
Consistently move to the newer versions.
0.58.0 also turned out to be the minimum bindgen version required to build rusticl, so document that.