bors f797978283 Auto merge of #12553 - epage:version, r=weihanglo ...

refactor: Pull out cargo-add MSRV code for reuse

### What does this PR try to resolve?

#12078 added MSRV code in `cargo add`. Our assumption when writing it is that we'd need to generalize the code before reusing it in other places, like `cargo install`.  This PR focused purely on that refactor because I'm hopeful it will be useful for other work I'm doing.  Despite not having a user for this yet, I think the `cargo install` case is inevitable and I feel this does a bit to clean up MSRV related code by using a more specific type everywhere.

### How should we test and review this PR?

Each commit gradually progresses things along

2023-08-25 14:56:24 +00:00

..

build-std

Add requirements to cargo_test.

2022-07-30 19:36:58 -07:00

testsuite

Auto merge of #12553 - epage:version, r=weihanglo

2023-08-25 14:56:24 +00:00