L1: Kalman Filter filtration update

• Add more numerical stability to KF filtration routines.
• minor changes

@s.zharko, @v.akishina, these are some of the changes we tried during our last meeting.

• I added the 3-correlation test found by Valentina.
• I added a small correction to the determinator as Sergey proposed.

For further tests of the fit one can uncomment lines 720+ in L1CATrackFinder.cxx

• The performance has been changed (improved) a bit.
• In the last commit I introduce a new histogram. Therefore the comparison with old versions via RunChecks.C will not work.

requested review from @s.zharko

assigned to @se.gorbunov

added 11 commits

• 0eda9373...1ce81b17 - 9 commits from branch computing:master
• eb563b49 - L1: update of filtration
• 033e34c4 - L1: performance histo update

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enabled an automatic merge when the pipeline for 033e34c4 succeeds

I think the correct type is std::ios_base::fmtflags.

// using fmtflags as a type: std::ios_base::fmtflags ff; ff = std::cout.flags();

added 1 commit

• 68602af0 - L1: fix mac compilation

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enabled an automatic merge when the pipeline for 68602af0 succeeds

Dear @se.gorbunov, @v.akishina,

you have been identified as code owner of at least one file which was changed with this merge request.

Please check the changes and approve them or request changes.

added CodeOwners label

merged