amazon-qldb-shell: don't vendor Cargo.lock

[TomaSajt]

Important note: this package is currently broken. Of course you can set NIXPKGS_ALLOW_BROKEN=1 to try to build it anyway.

This PR does not unbreak the package (I tried and failed).
It does, however, remove one of the few remaining lockfiles that were only vendored because they contain git dependencies, and not because upstream didn't provide them.
Those can now be un-vendored, since fetchCargoVendor works with git dependencies.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• Nixpkgs 25.11 Release Notes (or backporting 24.11 and 25.05 Nixpkgs Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
• NixOS 25.11 Release Notes (or backporting 24.11 and 25.05 NixOS Release notes)
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[terlar]

Thank you @TomaSajt, I have not used QLDB for a while and have thus been neglecting this package. I will approve this for now.

But given QLDB is being deprecated I will start the process of removing these packages:
https://docs.aws.amazon.com/qldb/latest/developerguide/document-history.html

[terlar]

Verified that cargoHash is correct.

[terlar]

Here is the PR removing the packages instead #410413