accounts: fix data race when closing manager #31982
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Fixes a data race on the
walletsslice when closing an account Manager.At the moment, there is a data race between a go-routine calling the Manager's
Closefunction and the background go-routine handling most operations on theManager. TheManager'swalletsfield is accessed without proper synchronization.By moving the closing of wallets from the
Close()function into the background thread, this issue can be resolved.