[7.12] Restrict ILM frozen phase to searchable snapshot actions only (#70158) #70171
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This commit changes the frozen phase within ILM in the following ways:
searchable_snapshot
action now no longer takes astorage
parameter. The storage type isdetermined by the phase within which it is invoked (shared cache for frozen and full copy for
everything else).
searchable_snapshot
searchable_snapshot
action.These changes may seem breaking, but since they are intended to go back to 7.12 which has not been
released yet, they are not truly breaking changes.
Backport of #70158