Script to check and test all crates separately

[lemunozm]

Description

When testing the entire workspace at once, rust chooses the crates with more features on them. This means that individually our crates can be broken, but because we are compiling all together it just works.

We can avoid this situation and be able to work faster compiling and testing each crate separately with any combination of features as follows:

cargo test -p <my-crate> -F runtime-benchmarks

Also, having them isolated compiling helps to find general compilation issues due to features in the future.

Propose

• Leave all crates without any compilation issues.
• Add a job to check automatically that all crates work separately with all feature combinations. This can take time, so I would propose creating a nightly job to do this.