Fix the issue where the Polaris Server exposes backend metadata in the error response body when the database is not bootstrapped. (#1837)

Author: bowang37927

persistence/eclipselink/src/main/java/org/apache/polaris/extension/persistence/impl/eclipselink/PolarisEclipseLinkMetaStoreSessionImpl.java

@@ -194,7 +194,7 @@ public <T> T runInTransaction(
       if (e.toString().toLowerCase(Locale.ROOT).contains("duplicate key")) {
         throw new AlreadyExistsException("Duplicate key error when persisting entity", e);
       } else {
-        throw e;
+        throw new RuntimeException("Error persisting entity", e);
       }
     }
   }

service/common/src/test/java/org/apache/polaris/service/exception/IcebergExceptionMapperTest.java

@@ -69,7 +69,8 @@ static Stream<Arguments> fileIOExceptionMapping() {
                 new FileIOUnknownHostException(
                     "mybucket.blob.core.windows.net: Name or service not known",
                     new RuntimeException(new UnknownHostException())),
-                404)),
+                404),
+            Arguments.of(new RuntimeException("Error persisting entity"), 500)),
         cloudCodeMappings.entrySet().stream()
             .flatMap(
                 entry ->