rust-consumer does not receive signals

[doc-sheet]

Environment

snuba 24.5.1 from https://github.com/getsentry/self-hosted

Steps to Reproduce

1. run some rust-consumer, for example

snuba rust-consumer --storage spans --consumer-group snuba-spans-consumers --auto-offset-reset=latest --max-batch-time-ms 1000 --no-strict-offset-reset

2. send SIGTERM to main process with kill -s SIGTERM <pid> or just do docker stop snuba-spans-consumer
3. check exit code / docker events

Expected Result

Consumer gracefully stops

Actual Result

Container killed by sigkill

Looks like master process does not propagate signals to rust consumer.
For example python version has some handlers for it.

[untitaker]

The handler for Rust is here:

snuba/rust_snuba/src/consumer.rs

Line 242 in 869e1a7

ctrlc::set_handler(move || {

it seems it may only handle SIGINT and not SIGTERM, but it's not clear.

Patches welcome