add tests for scala http4s server: (#21507)

Author: wing328

bin/configs/scala-http4s-server.yaml

@@ -1,6 +1,6 @@
 generatorName: scala-http4s-server
 outputDir: samples/server/petstore/scala-http4s-server
-inputSpec: modules/openapi-generator/src/test/resources/3_0/petstore.yaml
+inputSpec: modules/openapi-generator/src/test/resources/3_0/scala-http4s-server/petstore.yaml
 templateDir: modules/openapi-generator/src/main/resources/scala-http4s-server
 additionalProperties:
-  artifactId: openapi-scala-http4s-server
+  artifactId: openapi-scala-http4s-server