GeminiRequest are not full

[VladyslavLishchyna]

---

name: Feature request
about: GeminiRequest are not full, don`t contains "labels" field

---

According to this documentation https://cloud.google.com/vertex-ai/generative-ai/docs/model-reference/inference?_gl=1*1qhhhsi*_ga*MTcwMjMzNTkxOS4xNzE4OTY0MzU0*_ga_WH2QY8WWF5*czE3NDc5ODg4MzEkbzE1NyRnMSR0MTc0Nzk5MDE1MSRqNTAkbDAkaDAkZFIzUlVsTDBEVmRsUGdUc2xUbWI4NFpJZTU5WWNCSjVVYmc
request to Gemini contains "labels" so please add addition property "labels" to GeminiRequest and some possibility to add labels to requests

[markwallace-microsoft]

@VladyslavLishchyna would you be interested in contributing this change to Semantic Kernel?

[shethaadit]

Hi @markwallace-microsoft, @RogerBarreto, I have raised PR for this. Please let me know if anything is missed. :)