docs: Disable starting HA cluster when --storage-wal-enabled=false for IN_MEMORY_TRANSACTIONAL storage

[as51340]

Release note

Described new behaviour of snapshot flags. Explained that HA data instance won't be started if wal is disabled.

Related product PRs

PRs from product repo this doc page is related to:
memgraph/memgraph#3259

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Project	Deployment	Preview	Comments	Updated (UTC)
documentation	Ready	Preview	Comment	Sep 16, 2025 6:06am