Fix #9530: admin auth list make readable and admin auth delete bug fix

[shashvat-kedia]

Fix for issue #9530.

[bagasme]

What's the purpose of Flags: entry?

[shashvat-kedia]

@bagasme The error was because id was not specified as a possible flag for "delete" command thus command such as ./gitea admin auth delete --id 4 resulted in Incorrect Usage: flag provided but not defined: -id the method for handling deletion of LoginSource already depends upon id being provided through the --id flag. But it was not defined in microcmdAuthDelete adding the Flags: []cli.Flag{idFlag} makes id to be a possible flag for ./gitea admin auth delete command.

[codecov-io]

Codecov Report

Merging #9628 into master will decrease coverage by 0.06%.
The diff coverage is 53.64%.

@@            Coverage Diff             @@
##           master    #9628      +/-   ##
==========================================
- Coverage   42.22%   42.16%   -0.07%     
==========================================
  Files         582      583       +1     
  Lines       77105    77160      +55     
==========================================
- Hits        32561    32533      -28     
- Misses      40546    40622      +76     
- Partials     3998     4005       +7

Impacted Files	Coverage Δ
models/issue_watch.go	61.84% <ø> (-0.5%)	⬇️
services/pull/patch.go	62.65% <ø> (-0.24%)	⬇️
models/wiki.go	100% <ø> (+41.32%)	⬆️
routers/private/serv.go	33.33% <0%> (ø)	⬆️
models/pull.go	46.54% <0%> (ø)	⬆️
routers/repo/issue.go	37.79% <100%> (+0.13%)	⬆️
routers/repo/branch.go	53.07% <26.31%> (-4.59%)	⬇️
routers/repo/pull.go	30.75% <44.44%> (-0.03%)	⬇️
services/wiki/wiki.go	57.08% <57.08%> (ø)
routers/repo/wiki.go	38.88% <80.95%> (ø)	⬆️
... and 11 more

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