scripted-diff: Rename SelectCoinsMinConf to AttemptSelection

SelectCoinsMinConf is a bit of a misnomer now since it really just does
all of the coin selection given some parameters. So rename this to
something less annoying to say and makes a bit more sense.

-BEGIN VERIFY SCRIPT-
sed -i 's/SelectCoinsMinConf/AttemptSelection/g' $(git grep -l SelectCoinsMinConf ./src)
-END VERIFY SCRIPT-

src/bench/coin_selection.cpp

@@ -56,7 +56,7 @@ static void CoinSelection(benchmark::Bench& bench)
     bench.run([&] {
         std::set<CInputCoin> setCoinsRet;
         CAmount nValueRet;
-        bool success = wallet.SelectCoinsMinConf(1003 * COIN, filter_standard, coins, setCoinsRet, nValueRet, coin_selection_params);
+        bool success = wallet.AttemptSelection(1003 * COIN, filter_standard, coins, setCoinsRet, nValueRet, coin_selection_params);
         assert(success);
         assert(nValueRet == 1003 * COIN);
         assert(setCoinsRet.size() == 2);