Merge bitcoin/bitcoin#28136: refactor: move GetServicesNames from rpc/util.{h,cpp} to rpc/net.cpp

bbb68ffdbd refactor: drop protocol.h include header in rpc/util.h (Jon Atack)
1dd62c5295 refactor: move GetServicesNames from rpc/util.{h,cpp} to rpc/net.cpp (Jon Atack)

Pull request description:

  Move `GetServicesNames()` from `rpc/util` to `rpc/net.cpp`, as it is only called from that compilation unit and there is no reason for other ones to need it.

  Remove the `protocol.h` include in `rpc/util.h`, as it was only needed for `GetServicesNames()`, drop an unneeded forward declaration (the other IWYU suggestions would require more extensive changes in other files), and add 3 already-missing include headers in other translation units that are needed to compile without `protocol.h` in `rpc/util.h`, as `protocol.h` includes `netaddress.h`, which in turn includes `util/strencodings.h`.

ACKs for top commit:
  kevkevinpal:
    lgtm ACK [bbb68ff](bbb68ffdbd)
  ns-xvrn:
    ACK bbb68ff
  achow101:
    ACK bbb68ffdbd

Tree-SHA512: fcbe195874dd4aa9e86548685b6b28595a2c46f9869b79b6e2b3835f76b49cab4bef6a59c8ad6428063a41b7bb6f687229b06ea614fbd103e0531104af7de55d

src/rpc/net.cpp

@@ -16,6 +16,7 @@
 #include <netbase.h>
 #include <node/context.h>
 #include <policy/settings.h>
+#include <protocol.h>
 #include <rpc/blockchain.h>
 #include <rpc/protocol.h>
 #include <rpc/server_util.h>
@@ -98,6 +99,18 @@ static RPCHelpMan ping()
     };
 }
 
+/** Returns, given services flags, a list of humanly readable (known) network services */
+static UniValue GetServicesNames(ServiceFlags services)
+{
+    UniValue servicesNames(UniValue::VARR);
+
+    for (const auto& flag : serviceFlagsToStr(services)) {
+        servicesNames.push_back(flag);
+    }
+
+    return servicesNames;
+}
+
 static RPCHelpMan getpeerinfo()
 {
     return RPCHelpMan{