ci: add radius-decrease liveness check for puller manage() recovery

[misaakidis]

Summary

• Adds a new radius-decrease CI job (parallel with beekeeper) that validates puller manage() goroutine recovery after a storage-radius decrease
• Adds three patch files to shrink the reserve (capacity 200, wakeup 10s, threshold 100%) so the scenario triggers within CI time
• Builds a separate bee-2 binary from those patches and uses it exclusively in the radius-decrease job

Test plan

• beekeeper integration test job passes (unchanged)
• radius-decrease job passes: overflow → cascade → recovery all complete within 30 min
• On buggy builds, radius-decrease job times out at the recovery phase and logs the blocked goroutine message

Note: BEEKEEPER_BRANCH temporarily points to ci/radius-decrease-check (ethersphere/beekeeper#581) until that PR merges.