Fixed required body parameter when part of the proto message is path param

[MahikaJaguste]

References to other Issues or PRs

Fixes #4666

Have you read the Contributing Guidelines?

Yes

Brief description of what is fixed or changed

If a message field (in the body) is marked as required and it contains a field which is part of the path parameters, then the OpenAPI Swagger object created does not show this message field as required. Inside the renderFieldAsDefinition, code to getFieldBehaviorOption() is added when path params exists so that the required property of the message field can be captured.

Other comments