common/build-helper/rust.sh: use SODIUM_USE_PKG_CONFIG, pijul: update…

[jrvieira]

common/build-helper/rust.sh: use SODIUM_USE_PKG_CONFIG, pijul: update to 1.0.0.beta.9

Fixes #59131

Testing the changes

• I tested the changes in this PR: YES

Local build testing

• I built this PR locally for my native architecture, x86_64

[classabbyamp]

does this change to the build helper break (or remove the dependency on libsodium) any of the other rust packages that use libsodium?

garage
rdedup
python3-etebase
gst-plugins-rs1

[jrvieira]

No.

gst-plugins-rs1 fails with an unrelated pre-existing compiler error (implicit autoref in audioloudnorm/imp.rs), confirmed to also fail on unmodified upstream master.

[classabbyamp]

can you split this into 2 commits, one for the build helper change and one for the update?

[classabbyamp]

you don't need to close it, you can just remake the commits and force-push

[jrvieira]

Sorry, i'm not used to github. This PR is replaced by #59527