feat: adds redis auth.

[ianhundere]

Summary

This PR enables auth using the redis options struct to include a flag for a password/auth.

Closes #1613

Release Note

• Adds Redis Authentication

Documentation

[codecov]

Codecov Report

Merging #1627 (6799549) into main (3bf6253) will increase coverage by 0.04%.
Report is 5 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1627      +/-   ##
==========================================
+ Coverage   66.51%   66.55%   +0.04%     
==========================================
  Files          90       90              
  Lines        9048     9051       +3     
==========================================
+ Hits         6018     6024       +6     
+ Misses       2300     2298       -2     
+ Partials      730      729       -1     

Flag	Coverage Δ
e2etests	48.12% <100.00%> (+0.01%)	⬆️
unittests	47.60% <0.00%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
cmd/rekor-server/app/root.go	63.88% <100.00%> (+0.33%)	⬆️
pkg/api/api.go	69.23% <100.00%> (+0.26%)	⬆️
pkg/indexstorage/indexstorage.go	66.66% <100.00%> (ø)
pkg/indexstorage/redis/redis.go	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

[haydentherapper]

@bobcallaway Is the issue here that we need to set up go before CI is run?

[bobcallaway]

looks like a go mod tidy is needed, as well as an update to docker-compose.test.yml to include the password

[ianhundere]

looks like a go mod tidy is needed, as well as an update to docker-compose.test.yml to include the password

thanks, i ran go mod tidy and added a redis pw to docker-compose.test.yml.