ITS: remove CookedTracker and older ClustererTask

[f3sch]

Both have not been run in years and were actually none functional for a long while now.
With changing the data input, these are not maintainable anymore (sure one can make them compile superficially but they are not working).

[github-actions]

REQUEST FOR PRODUCTION RELEASES:
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[alibuild]

Error while checking build/O2/fullCI_slc9 for dbd6e9f at 2025-12-19 10:34:

## sw/BUILD/O2-latest/log
CMake Error at cmake/O2AddLibrary.cmake:76 (add_library):
CMake Error at cmake/O2AddLibrary.cmake:76 (add_library):

Full log here.

[davidrohr]

dataflow error is unrelated. From my side this could be merged, but should be checked with ITS experts before. I see also Ruben has already approved it.

[f3sch]

@shahor02 I think this can be merged?