Auto merge of #120411 - erikdesjardins:netbsdcall, r=Nilstrieb

i586_unknown_netbsd: use inline stack probes

This is one of the last two targets still using "call" stack probes.

I don't believe that this target uses call stack probes for any particular reason--inline stack probes are used on [`i686_unknown_netbsd`](https://github.com/rust-lang/rust/blob/b362939be16f9324dd9e6e36e22b606020068d75/compiler/rustc_target/src/spec/targets/i686_unknown_netbsd.rs#L8), suggesting they work on netbsd; and on [`i586_unknown_linux_gnu`](https://github.com/rust-lang/rust/blob/b362939be16f9324dd9e6e36e22b606020068d75/compiler/rustc_target/src/spec/targets/i586_unknown_linux_gnu.rs#L4) (via the base [`i686_unknown_linux_gnu`](https://github.com/rust-lang/rust/blob/b362939be16f9324dd9e6e36e22b606020068d75/compiler/rustc_target/src/spec/targets/i686_unknown_linux_gnu.rs#L9)), suggesting they work with `cpu = "pentium"`.

...although I don't have a netbsd system to test this on.

(cc `@he32)`

Author: bors