Standardize Co-Authored-By / Reviewed-By strings

[CirnoT]

Make sure all these strings use same capitalization style.

• Co-Authored-By -> Co-authored-by
• Reviewed-By -> Reviewed-by

[CirnoT]

On unrelated note, we should perform check against noreply email to avoid situation where Co-Authored-By is inserted twice for same user, once from commits with email exposed and once with noreply variant when merging from UI (if user selected to hide email)

[codecov-io]

Codecov Report

Merging #14097 (7949fce) into master (acd5e5a) will increase coverage by 0.01%.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##           master   #14097      +/-   ##
==========================================
+ Coverage   42.33%   42.35%   +0.01%     
==========================================
  Files         726      726              
  Lines       77799    77799              
==========================================
+ Hits        32940    32950      +10     
+ Misses      39445    39443       -2     
+ Partials     5414     5406       -8     

Impacted Files	Coverage Δ
modules/repofiles/temp_repo.go	59.65% <0.00%> (ø)
services/pull/merge.go	49.18% <100.00%> (ø)
modules/util/timer.go	42.85% <0.00%> (-42.86%)	⬇️
modules/indexer/code/elastic_search.go	0.00% <0.00%> (-1.77%)	⬇️
services/pull/pull.go	42.85% <0.00%> (+0.50%)	⬆️
modules/queue/unique_queue_disk_channel.go	55.38% <0.00%> (+1.53%)	⬆️
modules/log/file.go	75.20% <0.00%> (+1.60%)	⬆️
modules/process/manager.go	75.00% <0.00%> (+2.50%)	⬆️
modules/git/utils.go	80.55% <0.00%> (+2.77%)	⬆️
modules/charset/charset.go	73.03% <0.00%> (+4.49%)	⬆️
... and 2 more

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[lunny]

But it seems Github use Co-authored-by but not Co-Authored-By.

[CirnoT]

There seems to be both usages happening in the wild. Either one is fine with me, so long it's consistent across all places.

[silverwind]

Seems the lowercase variant is more common as far as git itself is concerned:

https://github.com/git/git/search?q=Reviewed-By&type=code

[CirnoT]

Switched to lowercase variant