ensure GetTrustBundle returns array of strings instead of a single string with newlines

[bobcallaway]

Fixes: #689

Signed-off-by: Bob Callaway bcallaway@google.com

[haydentherapper]

+1 to changing the interface, this looks good! Left a few comments

[codecov-commenter]

Codecov Report

Merging #690 (a3fcc08) into main (8010171) will increase coverage by 0.00%.
The diff coverage is 32.60%.

@@           Coverage Diff           @@
##             main     #690   +/-   ##
=======================================
  Coverage   54.21%   54.22%           
=======================================
  Files          36       36           
  Lines        2228     2248   +20     
=======================================
+ Hits         1208     1219   +11     
- Misses        927      936    +9     
  Partials       93       93           

Impacted Files	Coverage Δ
pkg/ca/googleca/v1/googleca.go	47.54% <0.00%> (-4.72%)	⬇️
pkg/server/grpc_server.go	52.17% <81.25%> (+0.65%)	⬆️
pkg/ca/baseca/baseca.go	56.09% <100.00%> (ø)
pkg/ca/fileca/watch.go	100.00% <0.00%> (+50.00%)	⬆️

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