Check and auto-resize dedupe index disk space#3188
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when creating new index, set disk space to be at least min thershold based on saved used disk space data
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Automatically resize the PVC volume used for dedupe index, based on usage.
Uses two thresholds (currently hard-coded):
Eg. if resize threshold is 75%, and min ratio threshold is 50%, the PVC volume is resize if more than 75% is used and set such that only 50% is used.
Current disk size is also stored in the collection, so that when loading the index from S3, it can be properly resize as well (using the above parameters).
The desired target is rounded up to the nearest GB, and used disk is rounded up and capacity rounded down (for setting status)
Note: only works for kvrocks, and may need an option to disable, as certain k8s system (Docker for Mac) may not report the PVC size correctly.