cargo: upgrade reqwest and use rustls

This removes the dependency on openssl / pkg-config. This in turn
avoids ~30s of overhead on the crate build CI job to install these
dependencies.

While I was here I ran `cargo update` to pull in newer versions of
various dependencies. I also removed some unused dependencies from
`Cargo.toml`.

Author: indygreg

.github/workflows/linux.yml

@@ -24,11 +24,6 @@ jobs:
       fail-fast: false
     name: crate / ${{ matrix.arch }}
     steps:
-      - name: Install System Dependencies
-        run: |
-          sudo apt update
-          sudo apt install -y --no-install-recommends libssl-dev pkg-config
-
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           persist-credentials: false