chore(nix): Add aws-lc-fips 2022/4

[dougch]

Release Summary:

Resolved issues:

none, replaces #5035

Description of changes:

This adds two new devShells to CI for aws-lc-fips, corresponding to their release dates. The 2022 version did not contain a version flag in the bssl utility, giving us an additional way to validate the version differences.

% nix develop .#awslcfips2022                                                                                                                                                                                                             
Setting up awslc-fips-2022 environment from flake.nix...
nix/shell.sh: Entering a devShell
Libcrypto binary /nix/store/p1ppskx3a38l63z63hrm4qrpdamgnk2r-openssl-1.0.2/bin/openssl available as openssl102
Libcrypto binary /nix/store/c918w93z1h3alkknsvi8cg5nbi5hqsxr-openssl-1.1.1/bin/openssl available as openssl111
Libcrypto binary /nix/store/vdrwp8kl7jilvhiw2w0sd2rmhszcbv0r-openssl-3.0.7/bin/openssl available as openssl30
Libcrypto binary /nix/store/zg23jsrs6k2xd0jsb5q4n9ifisy8b9wv-aws-lc/bin/bssl available as bssl
Libcrypto binary /nix/store/nrx6nxkfx922z5w4cx2xypqi8pj1db5g-aws-lc-fips/bin/bssl available as fips2022bssl
Libcrypto binary /nix/store/k48hlhz3km4cghlhk3v993zp5srkx2kn-aws-lc-fips/bin/bssl available as fips2024bssl
Libcrypto binary /nix/store/r7zi8dl4y288sqwv7mwhyckw7v18z371-libressl-3.6.1/bin/openssl available as libressl
[nix awslc-fips-2022] dougch@devdesktop22:~/gitrepos/s2n-tls$ fips2024bssl version
3.0.0
[nix awslc-fips-2022] dougch@devdesktop22:~/gitrepos/s2n-tls$ fips2022bssl version
Usage: /nix/store/nrx6nxkfx922z5w4cx2xypqi8pj1db5g-aws-lc-fips/bin/bssl COMMAND
...

Call-outs:

I have an outstanding task to work with aws-lc folks on accepting my flake.

Updates to CI will come after merging.

Testing:

How is this change tested (unit tests, fuzz tests, etc.)? locally
How can you convince your reviewers that this PR is safe and effective? No code was harmed, it's all nix.
Is this a refactor change? no

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.