Preserve a format of RPC command definitions

Currently RPC commands are formatted in a way that it's easy to read
and that test/lint/check-rpc-mappings.py can parse it.

To void breaking test/lint/check-rpc-mappings.py script by running
clang-format, RPC command definitions should be disabled for clang-format.

src/rpc/rawtransaction.cpp

@@ -1801,6 +1801,7 @@ UniValue converttopsbt(const JSONRPCRequest& request)
     return EncodeBase64((unsigned char*)ssTx.data(), ssTx.size());
 }
 
+// clang-format off
 static const CRPCCommand commands[] =
 { //  category              name                            actor (function)            argNames
   //  --------------------- ------------------------        -----------------------     ----------
@@ -1822,6 +1823,7 @@ static const CRPCCommand commands[] =
     { "blockchain",         "gettxoutproof",                &gettxoutproof,             {"txids", "blockhash"} },
     { "blockchain",         "verifytxoutproof",             &verifytxoutproof,          {"proof"} },
 };
+// clang-format on
 
 void RegisterRawTransactionRPCCommands(CRPCTable &t)
 {