feat: Support AWS credential manager

[pavelzw]

Description

xref prefix-dev/pixi#3438

@mwiebe could you test whether this works for you in pixi? you would need to build pixi with this version of rattler though

[mwiebe]

I'll give it a try, thanks!

[mwiebe]

I haven't done very much with rust yet, so not sure how to resolve the errors I'm getting. This is with rustc 1.85.1 (4eb161250 2025-03-15), I'll have to try debugging this later. After updating pixi main to point at this specific git commit, and doing cargo update to try fixing a zip dependency version mismatch, I have it to this error building pixi right now:

error[E0283]: type annotations needed
   --> /home/mw/.cargo/git/checkouts/uv-01b33d56c4bfa7c4/3d94602/crates/uv-client/src/httpcache/mod.rs:866:42
    |
866 |             if stale_amount <= max_stale.into() {
    |                             --           ^^^^
    |                             |
    |                             type must be known at this point
    |
    = note: multiple `impl`s satisfying `u64: PartialOrd<_>` found in the following crates: `core`, `deranged`:
            - impl PartialOrd for u64;
            - impl<MIN, MAX> PartialOrd<deranged::RangedU64<MIN, MAX>> for u64
              where the constant `MIN` has type `u64`, the constant `MAX` has type `u64`;
help: try using a fully qualified path to specify the expected types
    |
866 |             if stale_amount <= <u64_le as Into<T>>::into(max_stale) {
    |                                ++++++++++++++++++++++++++         ~

   Compiling rattler v0.33.3 (https://github.com/pavelzw/rattler.git?rev=8964037309c21aedfbd1c47adee8507e7c2d201e#89640373)

[baszalmstra]

Im going to merge this regardless because it seems like a good change!