Revert "lnwallet/interface_test: run tests with disabled hint cache"
Revert "lnwallet/interface_test: run tests with disabled hint cache"

This reverts commit 70ba3119b77151600d2b00c607ba89dfa6408254.

LightningNetwork/lnd,LightningNetwork/lnd,aakselrod/lnd,aakselrod/lnd