Make code compatible with LSTCore structure

[ariostas]

This PR makes the code compatible with the LSTCore structure, while still allowing it to be used as an external package like before. The changes consist of modifying the way the TrackLooper directory is found, and the include path to some headers.

[slava77]

/run standalone
/run cmssw

[github-actions]

The PR was built and ran successfully in standalone mode. Here are some of the comparison plots.

The full set of validation and comparison plots can be found here.

Here is a timing comparison:

   Evt    Hits       MD       LS      T3       T5       pLS       pT5      pT3      TC       Reset    Event     Short             Rate
   avg    144.9    230.2     88.7     76.3     81.0    308.2    103.0    129.1    197.1    814.8    2173.3    1720.2+/- 503.0    1163.6   explicit_cache[s=4] (master)
   avg    127.5    234.3     89.1     79.1     80.8    278.5     94.6    118.6    194.7    718.4    2015.5    1609.5+/- 563.3    1129.2   explicit_cache[s=4] (this PR)

[github-actions]

There was a problem while building and running with CMSSW. The logs can be found here.

[slava77]

There was a problem while building and running with CMSSW. The logs can be found here.

the errors are from attempt to #include "RecoTracker/LSTCore/interface/alpaka/Constants.h" and such.

should we keep LST_STANDALONE in the current CMSSW (need a PR to SegmentLinking/cmssw) ? I suppose we are not ready yet to just merge SegmentLinking/cmssw#19 together with this one.

[ariostas]

should we keep LST_STANDALONE in the current CMSSW (need a PR to SegmentLinking/cmssw) ?

Yeah, I forgot that in SegmentLinking/cmssw#19 I had made some other slight modifications to the LST package. For now let's just define LST_STANDALONE for the CMSSW compilation while we get ready to switch to LSTCore.

[ariostas]

/run cmssw 22

[github-actions]

The PR was built and ran successfully with CMSSW. Here are some plots.

OOTB All Tracks

The full set of validation and comparison plots can be found here.

[slava77]

/run standalone
/run cmssw

[github-actions]

The PR was built and ran successfully in standalone mode. Here are some of the comparison plots.

The full set of validation and comparison plots can be found here.

Here is a timing comparison:

   Evt    Hits       MD       LS      T3       T5       pLS       pT5      pT3      TC       Reset    Event     Short             Rate
   avg     43.7    322.5    121.6     70.8     93.4    496.1    128.5    157.8     98.9      2.4    1535.8     995.9+/- 266.0     419.0   explicit_cache[s=4] (master)
   avg     44.0    324.2    121.7     70.2     93.6    552.1    129.5    157.4    103.4      1.6    1597.7    1001.6+/- 263.2     436.5   explicit_cache[s=4] (this PR)

[github-actions]

The PR was built and ran successfully with CMSSW. Here are some plots.

OOTB All Tracks

The full set of validation and comparison plots can be found here.