Doc: Remove removed --ingester.recover-from-wal option and fix out-of-date defaults

[klausenbusk]

What this PR does / why we need it:

Remove removed --ingester.recover-from-wal option and fix out-of-date defaults

[CLAassistant]

All committers have signed the CLA.

[codecov-io]

Codecov Report

Merging #3559 (23cd2d1) into master (46eff3c) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3559      +/-   ##
==========================================
+ Coverage   63.18%   63.21%   +0.03%     
==========================================
  Files         206      206              
  Lines       17774    17774              
==========================================
+ Hits        11230    11236       +6     
+ Misses       5543     5536       -7     
- Partials     1001     1002       +1     

Impacted Files	Coverage Δ
pkg/logql/evaluator.go	89.83% <0.00%> (-0.36%)	⬇️
pkg/querier/queryrange/limits.go	88.57% <0.00%> (+1.90%)	⬆️
pkg/querier/queryrange/downstreamer.go	97.64% <0.00%> (+2.35%)	⬆️
pkg/promtail/targets/file/filetarget.go	66.89% <0.00%> (+2.75%)	⬆️

[stale]

This issue has been automatically marked as stale because it has not had any activity in the past 30 days. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

[klausenbusk]

Let's hope someone is gonna merge it :)

[stale]

This issue has been automatically marked as stale because it has not had any activity in the past 30 days. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

[klausenbusk]

....

[owen-d]

Sorry about the really long wait on this. The fix looks great