[PWGHF] Fixed mc gen of taskCharmResoDTrkReduced to mirror MC rec

[Luca610]

Fixed small bug, MC gen tree was not filled for correlated backgrounds even if fillOnlySignal was false

[github-actions]

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

[alibuild]

Error while checking build/O2Physics/code-check for 5e47db1 at 2026-08-13 10:14:

## sw/BUILD/lhapdf-latest/log
collect2: error: ld returned 1 exit status


## sw/BUILD/O2Physics-latest/log
2026-08-13T07:43:43.927+0200 [17077:139661501099648] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ByteStream.Read()", last gRPC error was [14: Socket closed]
2026-08-13T07:43:43.949+0200 [17077:139661501099648] [executioncontext.cpp:739] [ERROR] Failed to download output blob 83a8eb4462df227b786326c878d3532a8d2e2b8dc19f5f6866511a7c39d51943: 14: Socket closed
2026-08-13T07:49:04.426+0200 [17430:139652728434304] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: Socket closed]
2026-08-13T07:49:04.426+0200 [17430:139652728434304] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: Socket closed
2026-08-13T07:54:44.100+0200 [17430:139652728434304] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-13T08:03:33.109+0200 [14061:140676106190464] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ByteStream.Write()", last gRPC error was [14: Socket closed]
2026-08-13T08:03:53.113+0200 [14061:140676106190464] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.UpdateActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-13T08:01:07.598+0200 [17467:140259920653952] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: Socket closed]
2026-08-13T08:01:07.598+0200 [17467:140259920653952] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: Socket closed
2026-08-13T08:06:11.408+0200 [17467:140259920653952] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-13T08:16:11.036+0200 [17321:140315700113024] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ByteStream.Read()", last gRPC error was [14: Socket closed]
2026-08-13T08:16:11.040+0200 [17321:140315700113024] [executioncontext.cpp:739] [ERROR] Failed to download output blob 85936f386ff8a4f2013f923f64cf87581a707b31d69e73d1d46a915d3df49aa9: 14: Socket closed
2026-08-13T08:26:55.494+0200 [13601:140603998846592] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: recvmsg:Connection reset by peer]
2026-08-13T08:28:56.454+0200 [17392:140696070561408] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ByteStream.Read()", last gRPC error was [14: Socket closed]
2026-08-13T08:28:56.458+0200 [17392:140696070561408] [executioncontext.cpp:739] [ERROR] Failed to download output blob 91c6f70bd9fdccf170aa66cd9a64a4ab8111582f29ab228c5c589b53d6b68e42: 14: Socket closed
2026-08-13T09:35:12.721+0200 [17021:140203129364096] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ByteStream.Read()", last gRPC error was [14: Socket closed]
2026-08-13T09:35:12.732+0200 [17021:140203129364096] [executioncontext.cpp:739] [ERROR] Failed to download output blob 83e25ccf7667446d80b61c730e95360e89c136f2617cd078d4c6ce8340de784c: 14: Socket closed

Full log here.