Backport #9050: Revert "Bump github.com/dgraph-io/ristretto from 0.0.3 to 0.1.0 (#8500)"

[L3n41c]

What does this PR do?

Backport #9050: Revert "Bump github.com/dgraph-io/ristretto from 0.0.3 to 0.1.0 (#8500)"

Motivation

Fix the issue described in #9006 by reverting what introduced the issue at the first place.

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