fix(sync): fixed way of updating repodb when syncing a signature

[laurentiuNiculae]

What type of PR is this?

Which issue does this PR fix:

What does this PR do / Why do we need it:

If an issue # is not available please add repro steps and logs showing the issue:

Testing done on this change:

Automation added to e2e:

Will this break upgrades or downgrades?

Does this PR introduce any user-facing change?:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[andaaron]

LGTM

[codecov]

Codecov Report

Merging #1439 (071d0b2) into main (bf4b2b9) will decrease coverage by 0.01%.
The diff coverage is 92.96%.

@@            Coverage Diff             @@
##             main    #1439      +/-   ##
==========================================
- Coverage   90.78%   90.77%   -0.01%     
==========================================
  Files          99       99              
  Lines       22191    22158      -33     
==========================================
- Hits        20146    20115      -31     
- Misses       1525     1526       +1     
+ Partials      520      517       -3     

Impacted Files	Coverage Δ
pkg/test/common.go	84.74% <50.00%> (-0.16%)	⬇️
pkg/extensions/sync/signatures.go	86.86% <87.50%> (-1.00%)	⬇️
pkg/meta/repodb/boltdb-wrapper/boltdb_wrapper.go	89.29% <93.33%> (+0.03%)	⬆️
pkg/api/routes.go	95.14% <100.00%> (+0.67%)	⬆️
pkg/extensions/sync/utils.go	88.01% <100.00%> (-1.08%)	⬇️
pkg/meta/repodb/dynamodb-wrapper/dynamo_wrapper.go	93.29% <100.00%> (-0.02%)	⬇️
pkg/meta/repodb/storage_parsing.go	100.00% <100.00%> (ø)
pkg/meta/update.go	99.04% <100.00%> (-0.12%)	⬇️
pkg/storage/common.go	96.53% <100.00%> (+0.56%)	⬆️

... and 1 file with indirect coverage changes

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[rchincha]

lgtm

[rchincha]

There are conflicts