Radial and Spider Grid Keywords Not Supported

Add the DR, DTHETA and OUTRAD keywords as unsupported keywords with messages to enable the user to debug the input deck.

Back port candidate for release.

opm/simulators/utils/UnsupportedFlowKeywords.cpp

@@ -140,8 +140,10 @@ const KeywordValidation::UnsupportedKeywords& unsupportedKeywords()
         {"DPGRID", {false, std::nullopt}},
         {"DPKRMOD", {false, std::nullopt}},
         {"DPNUM", {false, std::nullopt}},
+        {"DR", {false, std::string{"Use the DRV keyword instead"}}},
         {"DRILPRI", {false, std::nullopt}},
         {"DSPDEINT", {false, std::nullopt}},
+        {"DTHETA", {false, std::string{"Use the DTHETAV keyword instead"}}},
         {"DUALPERM", {false, std::nullopt}},
         {"DUALPORO", {false, std::nullopt}},
         {"DUMPCUPL", {false, std::nullopt}},
@@ -430,6 +432,7 @@ const KeywordValidation::UnsupportedKeywords& unsupportedKeywords()
         {"OLDTRAN", {false, std::nullopt}},
         {"OLDTRANR", {false, std::nullopt}},
         {"OPTIONS", {false, std::nullopt}},
+        {"OUTRAD", {false, std::string{"Use the DRV keyword instead"}}},
         {"OUTSOL", {false, std::nullopt}},
         {"PARAOPTS", {false, std::nullopt}},
         {"PCG32D", {false, std::nullopt}},