NebulaGraph Operator v1.8.6

What's Changed

• fix(autofailover): Don't autofailover if network is down for a node. by @kevinliu24 in #571
• fix(storaged): run balance leader if storaged nodes are recreated or restarted by @kevinliu24 in #572
• Patch storaged monitor by @kevinliu24 in #575
• cherry-pick: update helm chart to 1.8.6 by @kevinliu24 in #578

Full Changelog: v1.8.5...v1.8.6