Add loading animation to deploying nodes
When the node is deploying, add animation wherever it means in progress. Otherwise user is unsure if anything is going on

Outcome
A deploying node now shows a spinner and live halo on the Nodes list, node header, Last Seen and Cloud State chip, and reads Stalled after 15 min. Self-hosted nodes spin once their install starts. Visual check passed. PR #6626 merged and Jaah Deploy succeeded. Follow-up: draft Task 8995. Memory: used mem-15203.
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