grpc-native: Rename ProtosTest class

Signed-off-by: Johannes Zottele <[email protected]>

Author: Jozott00

grpc/grpc-core/src/commonTest/kotlin/kotlinx/rpc/grpc/pb/ProtosTest.kt

@@ -9,7 +9,7 @@ import kotlinx.rpc.grpc.test.common.*
 import kotlin.test.Test
 import kotlin.test.assertEquals
 
-class TestProtos {
+class ProtosTest {
 
     private fun <T : Any> decodeEncode(
         msg: T,