Release notes and dependencies for v31r2

See merge request !2233

Always create and build the test functor cache

See merge request !2232

Remove internal allocations in TrackCloneKiller

See merge request !2221

Adapt to tracks containers with flexible sizes

See merge request !2208

Adapt to new Gaudi Monitoring

See merge request !2209

Remove OTDAQ from RecSummary

See merge request !2196

Fix python 3 support

See merge request !2224

A recent MR has broken python 3 support (before having the py3
platform in master). `DataObjectHandleBase` objects are not usable
as dict keys (not hashable) in python 3, and thus are converted to
str first.

Follow simplification of IElectron interface + misc. cleanup

See merge request !2220

* this algorithm uses a tool with the INeutralIDTool interface, but there seems
  to no implementation of this interface -- hence this algorithm can not
  have been running in any configuration...

* adapt IElectron implementations to simpler interface
* remove commented out obsolute configurations
* prefer `extends` over virtual inheritance
* use `float` for Calo Corrections instead of `double`
* use `enumerate` in a few places to simplify things
* move `SpreadEstimator` into the single .cpp file which uses it
* move 'CovarianceEstimator' into the single .cpp file which uses it
* prefer ToolHandle in CaloFutureElectron
* prefer STL algorithms over raw for loops

Cleanup of the MuonMatching code

See merge request !2212

Claire Prouve authored 4 years ago and Dorothea Vom Bruch committed 4 years ago

patch generated by https://gitlab.cern.ch/lhcb/Rec/-/jobs/9999700

Remove L0 from LoKiTrack

Closes Moore#209

See merge request !2195

Remove L0 from RecSummaryAlg

Closes lhcb-dpa/project#37

See merge request !2176

Remove L0 from CaloFuture/CaloFutureMoniDst

See merge request !2198

Removal of L0Candidate track flag from LoKiTrack

See merge request !2175

Remove L0 from TrackMonitors

See merge request !2179

Remove L0 from PV monitoring

See merge request !2197

Update tests to latest physics constants in Gaudi

See merge request !2206

Update references for !2215

See merge request !2219

Use transport-matrix similarity transform

See merge request !2214

Calo Showeroverlap: change default to not apply L/S correction

See merge request !2210