ansible: update cargo/rust on Debian 13

[richardlau]

Use Debian backports to install newer versions of cargo and rustc on Debian 13.

Refs: #4265

---

This is an attempt to port the instructions from https://backports.debian.org/Instructions/ to Ansible.

Deployment

• test-digitalocean-debian13-x64-1
• test-digitalocean-debian13-x64-2

[richardlau]

Opening as draft until I can verify it works. I've taken the machines offline and will attempt to update one of them when the currently executing builds are done.

[richardlau]

Test CI: https://ci.nodejs.org/job/node-test-commit-linux/70884/nodes=debian13-x64/console

15:29:04 python3 ./configure --verbose 
15:29:04 Node.js configure: Found Python 3.13.5...
15:29:04 Detected clang C++ compiler (CXX=ccache clang++-19) version: 19.1.7
15:29:04 Detected clang C compiler (CC=ccache clang-19) version: 19.1.7
15:29:04 Detected cargo (CARGO=cargo): 1.94.1
15:29:04 Detected rustc (RUSTC=rustc): 1.94.1
...