Replace libm_test::{Float, Int} with libm::{Float, Int}

This involves moving some things from full generic implementations (e.g.
`impl<F: Float> SomeTrait for F { /* ... */ }` to generic functions and
macros to implement traits that call them, due to orphan rule violations
after `Float` became a not-in-crate trait.

`Hex` was moved to `test_traits` so we can eliminate `num_traits`.

Author: tgross35

crates/libm-test/Cargo.toml

@@ -24,7 +24,7 @@ short-benchmarks = []
 [dependencies]
 anyhow = "1.0.90"
 az = { version = "1.2.1", optional = true }
-libm = { path = "../.." }
+libm = { path = "../..", features = ["unstable-test-support"] }
 libm-macros = { path = "../libm-macros" }
 musl-math-sys = { path = "../musl-math-sys", optional = true }
 paste = "1.0.15"

crates/libm-test/src/lib.rs

@@ -1,13 +1,12 @@
 pub mod gen;
 #[cfg(feature = "test-multiprecision")]
 pub mod mpfloat;
-mod num_traits;
 mod precision;
 mod test_traits;
 
-pub use num_traits::{Float, Hex, Int};
+pub use libm::support::{Float, Int};
 pub use precision::{MaybeOverride, SpecialCase, multiprec_allowed_ulp, musl_allowed_ulp};
-pub use test_traits::{CheckBasis, CheckCtx, CheckOutput, GenerateInput, TupleCall};
+pub use test_traits::{CheckBasis, CheckCtx, CheckOutput, GenerateInput, Hex, TupleCall};
 
 /// Result type for tests is usually from `anyhow`. Most times there is no success value to
 /// propagate.