Add support for multi2vec_google_gemini vectorizer configuration #542
Description
Add support for new apiEndpoint setting for multi2vec-google module.
This setting should be added in simiral way that it was added for text2vec_google_aistudio vectorizer config.
apiEndpoint should be set to generativelanguage.googleapis.com by default in multi2vec_google_gemini vectorizer config.
Remember that location and project_id settings should not be available to se in multi2vec_google_gemini vectorizer config.