Allow addition of gpg keyring with multiple keys

[zeripath]

Related #6778

Signed-off-by: Andrew Thornton [email protected]

[codecov-commenter]

Codecov Report

Merging #12487 into master will increase coverage by 0.01%.
The diff coverage is 23.52%.

@@            Coverage Diff             @@
##           master   #12487      +/-   ##
==========================================
+ Coverage   43.48%   43.50%   +0.01%     
==========================================
  Files         642      643       +1     
  Lines       71040    71142     +102     
==========================================
+ Hits        30893    30949      +56     
- Misses      35136    35191      +55     
+ Partials     5011     5002       -9     

Impacted Files	Coverage Δ
models/migrations/migrations.go	4.66% <ø> (ø)
models/migrations/v147.go	0.00% <0.00%> (ø)
routers/user/setting/keys.go	10.67% <0.00%> (-0.67%)	⬇️
services/pull/review.go	47.74% <0.00%> (ø)
models/gpg_key.go	54.81% <64.15%> (+0.23%)	⬆️
routers/api/v1/user/gpg_key.go	64.15% <100.00%> (ø)
modules/indexer/stats/queue.go	64.70% <0.00%> (-11.77%)	⬇️
modules/indexer/stats/db.go	43.47% <0.00%> (-8.70%)	⬇️
services/pull/pull.go	42.03% <0.00%> (+0.46%)	⬆️
... and 13 more

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