Backport cache quota restriction to 1.2

Qinustyrequested to merge
Qinusty/563-cache-quota-restriction into bst-1.2

Description

This is a backport of !563 (merged)

Changes proposed in this merge request:

  • Cache quota will be restricted to system storage space
  • Cache quota must be at least 2GB

This merge request, when approved, will close issue/bug: N/A

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