[Common] Change log level from info to debug for VDrift update

[romainschotter]

No description provided.

[github-actions]

O2 linter results: ❌ 1 errors, ⚠️ 2 warnings, 🔕 0 disabled

[alibuild]

Error while checking build/O2Physics/code-check for 121b294 at 2026-09-02 16:23:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 4 errors and 0 warnings.'
Found 4 errors and 0 warnings.
++ [[ 4 -gt 0 ]]
++ cat /sw/BUILD/169f94ff5164e0e02c667da2a14c04d7cdcb9141/O2Physics-code-check/errors.txt
Common/Core/TPCVDriftManager.h:90:11: error: variable 'tTB' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
Common/Core/TPCVDriftManager.h:90:16: error: variable 'tTBErr' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
Common/Core/TPCVDriftManager.h:94:7: error: uninitialized record type: 'enc' [cppcoreguidelines-pro-type-member-init,-warnings-as-errors]
Common/Core/TPCVDriftManager.h:95:20: error: do not access members of unions; consider using (boost::)variant instead [cppcoreguidelines-pro-type-union-access,-warnings-as-errors]
++ [[ 0 -gt 0 ]]
++ [[ 4 -gt 0 ]]
++ exit 1
--

Full log here.

[alibuild]

Error while checking build/O2Physics/staging for 121b294 at 2026-09-02 17:15:

## sw/BUILD/O2Physics-latest/log
c++: fatal error: Killed signal terminated program cc1plus
c++: fatal error: Killed signal terminated program cc1plus
ninja: build stopped: subcommand failed.

Full log here.