[CI] Setup API keys for Tavily and Google Search Custom

[loicmathieu]

Setup API keys for Tavily and Google Search Custom inside the CI.
Tavily has an Free plan https://www.tavily.com/#pricing without credit card that could be used for that.

The following env variables must be available inside the CI so the tests run:

• GOOGLE_API_KEY
• GOOGLE_CSI_KEY
• TAVILY_API_KEY