Add dt_hit / dt_ptoca linear fit information for hits on a track

[michaelmackenzie]

The straw hit time vs. track expected time at the hit position has a non-unit slope when the wrong mass hypothesis is assumed. This slope information can be used in PID, as is relevant to PR Mu2e/MLTrain#9. This adds a reco data product with this information and a producer module to create a collection of these products for input KalSeed or KalSeedPtr collections.

[FNALbuild]

Hi @michaelmackenzie,
You have proposed changes to files in these packages:

• ParticleID
• RecoDataProducts

which require these tests: build.

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⌛ The following tests have been triggered for e7ca770: build (Build queue - API unavailable)

About FNALbuild. Code review on Mu2e/Offline.

[FNALbuild]

☔ The build tests failed for e7ca770.

Test	Result	Details
test with	✅	Command did not list any other PRs to include
merge	✅	Merged e7ca770 at 3d84f93
build (prof)	✅	Log file. Build time: 04 min 18 sec
ceSimReco	✅	Log file.
g4test_03MT	✅	Log file.
transportOnly	✅	Log file.
POT	✅	Log file.
g4study	✅	Log file.
cosmicSimReco	✅	Log file.
cosmicOffSpill	✅	Log file.
ceSteps	✅	Log file.
ceDigi	✅	Log file.
muDauSteps	✅	Log file.
ceMix	✅	Log file.
rootOverlaps	✅	Log file.
g4surfaceCheck	✅	Log file.
trigger	✅	Log file.
check_cmake	❌	Log file. Return Code 1.
FIXME, TODO	✅	TODO (0) FIXME (0) in 2 files
clang-tidy	➡️	2 errors 9 warnings
whitespace check	✅	no whitespace errors found

N.B. These results were obtained from a build of this Pull Request at e7ca770 after being merged into the base branch at 3d84f93.

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