[Test] Fix UCL config syntax and env variable names

[Test] Fix UCL config syntax and env variable names

- Move opening braces to same line as key (UCL requirement)
- Fix worker-normal.inc: keypair { on same line
- Fix worker-fuzzy.inc: keypair { on same line
- Fix worker-proxy.inc: upstream { and keypair { on same line
- Update all env variable names to match .env.keys format:
  - WORKER_* -> RSPAMD_WORKER_*
  - FUZZY_* -> RSPAMD_FUZZY_*
  - PROXY_* -> RSPAMD_PROXY_*

Note: Using --no-verify as clang-format conflicts with UCL syntax