fix: Disable Ruff cache in CI to avoid Docker permission failures

[paulschreiber]

Description

Disable Ruff cache in CI to avoid Docker permission failures

Should address:

docker compose -f docker-compose.ci.yml run --quiet-pull --rm web ruff check terraso_backend
 Container terraso-backend-soil-id-db-1  Running
 Container terraso-backend-db-1  Running
error: Failed to initialize cache at /app/.ruff_cache: Permission denied (os error 13)
ruff failed
  Cause: Failed to create temporary file
  Cause: No such file or directory (os error 2) at path "/app/.ruff_cache/0.14.4/.tmpB76K4d"

make: *** [Makefile:49: lint] Error 2