fix: correctly detect all altcoin names in check-bitcoin-only

The -d multi-select picks only coins that are available on _all_ models.
Besides, it's more correct to check even for unsupported altcoins.

tools/check-bitcoin-only

@@ -16,7 +16,7 @@ for exception in "${EXCEPTIONS[@]}"; do
 done
 
 # dump all coins except the first 3 (Bitcoin, Testnet, Regtest), exclude names with less than 4 characters
-ALTCOINS=$(./common/tools/cointool.py dump -l -p -t -d T1B1 -d T2T1 -d T2B1 | grep '"name"' | cut -d '"' -f 4 | tail -n +4 | awk 'length($0)>3')
+ALTCOINS=$(./common/tools/cointool.py dump -l -p -t | grep '"name"' | cut -d '"' -f 4 | tail -n +4 | awk 'length($0)>3')
 # split on newlines only
 OLDIFS=$IFS
 IFS="