wallet: Log and ignore errors in ListWalletDir and IsBerkeleyBtree
wallet: Log and ignore errors in ListWalletDir and IsBerkeleyBtree

Github-Pull: #15583
Rebased-From: 15c69b158da570f4e1430280c610e94ffdee0e51
Tree-SHA512: edef7cafc5a2cb8d3355591a7742ef61454a5dedbb1dc22f6cc6bae42329d887f3f4a054f2aeedf31180051f50b6478d09e204066205699dabc0cb67b0ce4a96

myriadteam/myriadcoin,ahmedbodi/vertcoin,myriadcoin/myriadcoin,GroestlCoin/bitcoin,OmniLayer/omnicore,ahmedbodi/vertcoin,qtumproject/qtum,qtumproject/qtum,GroestlCoin/bitcoin,untrustbank/litecoin,untrustbank/litecoin,vertcoin/vertcoin,myriadteam/myriadcoin,vertcoin/vertcoin,ahmedbodi/vertcoin,myriadcoin/myriadcoin,GroestlCoin/GroestlCoin,myriadcoin/myriadcoin,GroestlCoin/GroestlCoin,qtumproject/qtum,OmniLayer/omnicore,bespike/litecoin,myriadteam/myriadcoin,OmniLayer/omnicore,myriadcoin/myriadcoin,qtumproject/qtum,untrustbank/litecoin,bespike/litecoin,GroestlCoin/GroestlCoin,bespike/litecoin,GroestlCoin/bitcoin,untrustbank/litecoin,GroestlCoin/GroestlCoin,bespike/litecoin,qtumproject/qtum,GroestlCoin/bitcoin,myriadteam/myriadcoin,GroestlCoin/GroestlCoin,vertcoin/vertcoin,GroestlCoin/bitcoin,untrustbank/litecoin,GroestlCoin/bitcoin,GroestlCoin/GroestlCoin,myriadcoin/myriadcoin,qtumproject/qtum,OmniLayer/omnicore,bespike/litecoin,myriadteam/myriadcoin,OmniLayer/omnicore,untrustbank/litecoin,ahmedbodi/vertcoin,ahmedbodi/vertcoin,myriadteam/myriadcoin,vertcoin/vertcoin,ahmedbodi/vertcoin,qtumproject/qtum,bespike/litecoin,myriadcoin/myriadcoin,OmniLayer/omnicore,vertcoin/vertcoin,vertcoin/vertcoin