[PWGCF] Fix MC only processing in femto producer

[ariedel-cern]

Fix MC only processing process function in the femto producer task.

[github-actions]

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

[alibuild]

Auto-approving on behalf of @ariedel-cern.

[alibuild]

Auto-approving on behalf of @ariedel-cern.

[vkucera]

@ariedel-cern Please fix the title.

[alibuild]

Error while checking build/O2Physics/code-check for 5b81563 at 2026-07-01 21:04:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ grep -E '^/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/.+: error: ' /sw/BUILD/28c47b41aa1489b8ac813a3967eec5e55819513b/O2Physics-code-check/error-log.txt
++ sed -e s,/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/,,g
++ sort -V
++ uniq
++ grep -E '^/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/.+: warning: ' /sw/BUILD/28c47b41aa1489b8ac813a3967eec5e55819513b/O2Physics-code-check/error-log.txt
++ sed -e s,/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/,,g
++ sort -V
++ uniq
++ true
+++ wc -l
++ N_ERROR=7
+++ wc -l
++ N_WARNING=0
++ echo 'Found 7 errors and 0 warnings.'
Found 7 errors and 0 warnings.
++ [[ 7 -gt 0 ]]
++ cat /sw/BUILD/28c47b41aa1489b8ac813a3967eec5e55819513b/O2Physics-code-check/errors.txt
PWGCF/Femto/Core/mcBuilder.h:19:10: error: 'PWGCF/Femto/Core/dataTypes.h' file not found [clang-diagnostic-error]
PWGCF/Femto/Core/mcBuilder.h:37:11: error: variable 'o2' is non-const and globally accessible, consider making it const [cppcoreguidelines-avoid-non-const-global-variables,-warnings-as-errors]
PWGCF/Femto/TableProducer/femtoProducer.cxx:16:10: error: 'PWGCF/Femto/Core/cascadeBuilder.h' file not found [clang-diagnostic-error]
PWGCF/Femto/TableProducer/femtoProducer.cxx:52:1: error: nested namespaces can be concatenated [modernize-concat-nested-namespaces,-warnings-as-errors]
PWGCF/Femto/TableProducer/femtoProducer.cxx:85:8: error: constructor does not initialize these fields: confCcdb, collisionBuilderProducts, confCollisionTables, confCollisionFilters, confCollisionBits, confCollisionRctFlags, collisionBuilder, trackBuilderProducts, confTrackTables, trackBuilder, confTrackBits, confTrackFilters, v0builderProducts, confV0Tables, confV0Filters, confK0shortBits, k0shortBuilder, confLambdaBits, lambdaBuilder, antilambdaBuilder, cascadeBuilderProducts, confCascadeTables, confCascadeFilters, confXiBits, xiBuilder, confOmegaBits, omegaBuilder, kinkBuilderProducts, confKinkTables, confKinkFilters, confSigmaBits, sigmaBuilder, confSigmaPlusBits, sigmaPlusBuilder, confMc, confMcTables, mcProducts, mcBuilder, ccdb [cppcoreguidelines-pro-type-member-init,-warnings-as-errors]
PWGCF/Femto/TableProducer/femtoProducer.cxx:215:14: error: redundant boolean literal in conditional return statement [readability-simplify-boolean-expr,-warnings-as-errors]
PWGCF/Femto/TableProducer/femtoProducer.cxx:229:14: error: redundant boolean literal in conditional return statement [readability-simplify-boolean-expr,-warnings-as-errors]
++ [[ 0 -gt 0 ]]
++ [[ 7 -gt 0 ]]
++ exit 1
--

Full log here.

[vkucera]

@ariedel-cern You merged the PR with the original title.