scripted-diff: Rename PACKAGE_* variables to CLIENT_*

This change ensures consistent use of the `CLIENT_` namespace everywhere
in the repository.

-BEGIN VERIFY SCRIPT-

ren() { sed -i "s/\<$1\>/$2/g" $( git grep -l "$1" ./cmake ./src :\(exclude\)./src/secp256k1 ./test ) ; }

ren PACKAGE_NAME      CLIENT_NAME
ren PACKAGE_VERSION   CLIENT_VERSION_STRING
ren PACKAGE_URL       CLIENT_URL
ren PACKAGE_BUGREPORT CLIENT_BUGREPORT

-END VERIFY SCRIPT-

src/addrdb.cpp

@@ -150,7 +150,7 @@ bool CBanDB::Write(const banmap_t& banSet)
 bool CBanDB::Read(banmap_t& banSet)
 {
     if (fs::exists(m_banlist_dat)) {
-        LogPrintf("banlist.dat ignored because it can only be read by " PACKAGE_NAME " version 22.x. Remove %s to silence this warning.\n", fs::quoted(fs::PathToString(m_banlist_dat)));
+        LogPrintf("banlist.dat ignored because it can only be read by " CLIENT_NAME " version 22.x. Remove %s to silence this warning.\n", fs::quoted(fs::PathToString(m_banlist_dat)));
     }
     // If the JSON banlist does not exist, then recreate it
     if (!fs::exists(m_banlist_json)) {
@@ -215,7 +215,7 @@ util::Result<std::unique_ptr<AddrMan>> LoadAddrman(const NetGroupManager& netgro
         DumpPeerAddresses(args, *addrman);
     } catch (const std::exception& e) {
         return util::Error{strprintf(_("Invalid or corrupt peers.dat (%s). If you believe this is a bug, please report it to %s. As a workaround, you can move the file (%s) out of the way (rename, move, or delete) to have a new one created on the next start."),
-                                     e.what(), PACKAGE_BUGREPORT, fs::quoted(fs::PathToString(path_addr)))};
+                                     e.what(), CLIENT_BUGREPORT, fs::quoted(fs::PathToString(path_addr)))};
     }
     return addrman;
 }