Multiple LFS improvements

[zeripath]

• Radically increase the logging within the LFS server and prevent the passing of internal error information to clients
• Handle cursoring in LFS Lock querying.
• Use a standardised jwt.Claims object rather than passing generic map

Close #10665

[guillep2k]

👍

[codecov-io]

Codecov Report

Merging #10667 into master will decrease coverage by 0.01%.
The diff coverage is 16.77%.

@@            Coverage Diff             @@
##           master   #10667      +/-   ##
==========================================
- Coverage   43.57%   43.56%   -0.02%     
==========================================
  Files         588      588              
  Lines       82490    82587      +97     
==========================================
+ Hits        35949    35982      +33     
- Misses      42087    42134      +47     
- Partials     4454     4471      +17

Impacted Files	Coverage Δ
cmd/serv.go	2.8% <0%> (-0.04%)	⬇️
modules/setting/setting.go	44.33% <100%> (+0.26%)	⬆️
modules/lfs/server.go	40.35% <11.94%> (-4.25%)	⬇️
modules/lfs/locks.go	45.91% <22.41%> (-4.69%)	⬇️
modules/lfs/content_store.go	45.33% <7.69%> (-7.8%)	⬇️
modules/notification/indexer/indexer.go	50.66% <0%> (-4%)	⬇️
modules/git/command.go	86.95% <0%> (-2.61%)	⬇️
models/unit.go	37.03% <0%> (-2.47%)	⬇️
models/pull.go	42.85% <0%> (+0.55%)	⬆️
services/pull/pull.go	35.88% <0%> (+0.88%)	⬆️
... and 2 more

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