Use a separate HTTP Client for Geo requests

Currently, the client that performs HTTP requests for Geo pushes is the same as the one that performs internal HTTP requests.

However, it causes problems with the following setups:

• Internal requests are configured to be via UNIX connections
• The Primary node is configured to be HTTP(S)

The UNIX client cannot do the request to HTTP(S). This commit introduces a separate client for Geo requests.

Related issue: gitlab#391407 (comment 1347514301)