GPU TPC: Fix minor bug in cluster removal protection and minor improvements, fixes the deterministic mode partially

[davidrohr]

This fixes for sure the problem we introduced into the deterministic mode with the cluster removal protection.
However, on the NVIDIA Blackwell GPU I now see a new inconsistency in the sector track refit.
That code was not changed in a long time, so it could be an artifact of CUDA 13 / the new NVIDIA architecture.
Will debug and fix in a separate PR.

[github-actions]

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[alibuild]

Error while checking build/O2/fullCI_slc9 for f638a7f at 2026-02-20 06:41:

++ cp /sw/slc9_x86-64/O2/15086-slc9_x86-64-local1/compile_commands.json .
+++ python3 -c 'import json, os; print(os.path.commonpath([x["file"] for x in json.loads(open("compile_commands.json").read()) if "sw/BUILD" not in x["file"] and "G__" not in x["file"] and x["file"].endswith(".cxx")]))'
++ O2_SRC=/sw/SOURCES/O2/15086-slc9_x86-64/0
++ [[ -e /sw/SOURCES/O2/15086-slc9_x86-64/0/CMakeLists.txt ]]

Full log here.