ci: run Rust build in release mode too

[axic]

cargo build will build Fizzy in Debug profile, while cargo build --release will do with Release in cmake, see https://docs.rs/cmake/0.1.44/cmake/struct.Config.html#method.profile. The more specific translation rules can be seen in https://docs.rs/cmake/0.1.44/src/cmake/lib.rs.html#553-558 (it can use Release, RelWithDebInfo, MinSizeRel depending on settings).

We could also decide to force Release mode if we want.

Furthermore it seems PIC is used in both modes, we may want to investigate this (see https://docs.rs/cmake/0.1.44/cmake/struct.Config.html#method.pic).

[chfast]

The more specific translation rules can be seen in https://docs.rs/cmake/0.1.44/src/cmake/lib.rs.html#553-558 (it can use Release, RelWithDebInfo, MinSizeRel depending on settings).

These look good.

Furthermore it seems PIC is used in both modes, we may want to investigate this (see https://docs.rs/cmake/0.1.44/cmake/struct.Config.html#method.pic).

I can benchmark PIC builds some day.

[codecov]

Codecov Report

Merging #586 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #586   +/-   ##
=======================================
  Coverage   98.23%   98.23%           
=======================================
  Files          62       62           
  Lines        8990     8990           
=======================================
  Hits         8831     8831           
  Misses        159      159