[9.0] [POC] Pilot legacy logging

[Robin-Van-de-Merghel]

BEGINRELEASENOTES

*PilotManagerHandler NEW: POC base on #8233 to manage pilots, and allow legacy pilots to send logs.

ENDRELEASENOTES

[Robin-Van-de-Merghel]

Context

DIRAC pilot: Pilot sent by DIRAC with a proxy without a DiracX token embedded in it

Legacy pilot: Pilot sent by DIRAC with a proxy with a DiracX token embedded in it

DiracX pilot: Pilot sent by DiracX with a secret to exchange for a DiracX token

Feature

Connected to:

1. https://github.com/DIRACGrid/diracx/pull/596 for DiracX backend supporting pilot management, and legacy logging
2. https://github.com/DIRACGrid/Pilot/pull/260 to contact DiracX directly to send logs from a proxy (+ later with a secret)

We can have a legacy pilot:

1. Extracting a DiracX token from its proxy (showed by every integration test)
2. Sending logs to DiracX
3. Refreshing its tokens because it's an user token with a short lifespan

[Robin-Van-de-Merghel]

[!IMPORTANT] This PR is not usable in prod as of now.

Pilots DO NOT have tokens in their proxies, so we cannot extract their token from it. https://github.com/DIRACGrid/Pilot/pull/260 is only working as in the CI, pilot proxies are generate via a dirac-proxy-init which embed a DiracX token.

In the SiteDirector, there's no such thing.