[PWGDQ] Add SS/OS functionality to J/Psi-muon correlations task + fixes

[kaareendrup]

This PR will add minor changes to J/Psi-muon correlations task:

• Add extraction of SS dilepton pairs and save to different subdirectories
• Remove manual dilepton cuts and use aod filters instead
• Fix default value of ccdb url

[github-actions]

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

[alibuild]

Error while checking build/O2Physics/code-check for 00ff06a at 2026-08-03 11:18:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 1 errors and 0 warnings.'
Found 1 errors and 0 warnings.
++ [[ 1 -gt 0 ]]
++ cat /sw/BUILD/b08793249e4f1f25d53df56645bff9701f53904c/O2Physics-code-check/errors.txt
PWGDQ/Tasks/jPsiMuonCorrelations.cxx:143:20: error: no header providing "Form" is directly included [misc-include-cleaner,-warnings-as-errors]
++ [[ 0 -gt 0 ]]
++ [[ 1 -gt 0 ]]
++ exit 1
--

Full log here.