feat: support using GCS for backup uploader #4571

All 258 tests pass in 1h 25m 35s

16 files ±0 121 suites ±0 1h 25m 35s ⏱️ + 4m 12s
258 tests ±0 258 ✅ ±0 0 💤 ±0 0 ❌ ±0
261 runs ±0 261 ✅ ±0 0 💤 ±0 0 ❌ ±0

Results for commit 759cd04. ± Comparison against earlier commit 48d1a0d.