[PWGHF] Move corrBinning to the init function

[atavirag]

No description provided.

[github-actions]

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

[alibuild]

Error while checking build/O2Physics/code-check for 4caed2b at 2026-08-18 13:03:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 2 errors and 0 warnings.'
Found 2 errors and 0 warnings.
++ [[ 2 -gt 0 ]]
++ cat /sw/BUILD/71b7eed827b400b4cd9cb1abdff74e195e3ad032/O2Physics-code-check/errors.txt
PWGHF/HFC/TableProducer/correlatorDMesonPairs.cxx:238:8: error: no header providing "std::unique_ptr" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGHF/HFC/TableProducer/correlatorDMesonPairs.cxx:416:24: error: no header providing "std::make_unique" is directly included [misc-include-cleaner,-warnings-as-errors]
++ [[ 0 -gt 0 ]]
++ [[ 2 -gt 0 ]]
++ exit 1
--

Full log here.