feat(DEVC-1752): added requests.Session reuse; replaced third-party tenacity with builtin urllib3 Retry

[kossman]

Rationale

DataApi is suffering of a large number of connections created by applications. The issue is that Python apps establish a new connection with each request. To fix this, we need to change how we handle HTTPS requests in the SDK.

Changes

So, in the requests library, we need to properly use Session objects https://requests.readthedocs.io/en/latest/user/advanced/
That will bring all that we badly need:

https://requests.readthedocs.io/en/latest/user/advanced/#keep-alive
https://requests.readthedocs.io/en/latest/user/advanced/#example-automatic-retries

What was done:

1. Added requests.Session object for making any HTTP requests from Api(...)
2. Added posibility to adjust some params related to connection pool:
   a. POOL_CONNECTIONS_COUNT - Total pools count
   b. POOL_MAX_SIZE - Max connections count per pool/host
   c. POOL_BLOCK - Wait until connection released or not (instantly raise an exception)
   d. MAX_RETRY_COUNT - If 0 then retires will be disabled, otherwise retrying logic will be used
3. Move retrying logic from tenacity to internal urllib3.util.Retry(...)
4. Removed redundant dependency tenacity from python-sdk
5. Bump version for py3.13 to py3.13.3 at CI version matrix in order to fix broken tests for logging
6. Bump version for fakeredis also according to failed some tests