Prepare release 1.27.0

[joe-elliott]

Short description of the changes

• Added 1.27.0 release notes
• Added note for make changelog that only default token permissions are needed

[pavolloffay]

There is one commit in the UI https://github.com/jaegertracing/jaeger-ui/commits/master. I am not sure if it is worth releasing and including it here.

[yurishkuro]

I think you want to do the UI release first and include the new hash in this PR so that we don't have multiple release-related commits

[yurishkuro]

cc9643c - (HEAD -> master, upstream/master) Enable regexes and functions in link patterns (#817) (10 days ago)

This looks like a new feature, so warrants a new UI release imo.

[codecov]

Codecov Report

Merging #3306 (f6d35df) into master (56884ad) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3306   +/-   ##
=======================================
  Coverage   95.98%   95.98%           
=======================================
  Files         259      259           
  Lines       15434    15434           
=======================================
  Hits        14814    14814           
- Misses        525      526    +1     
+ Partials       95       94    -1     

Impacted Files	Coverage Δ
pkg/config/tlscfg/cert_watcher.go	92.63% <0.00%> (-2.11%)	⬇️
plugin/storage/integration/integration.go	78.88% <0.00%> (-0.40%)	⬇️
cmd/query/app/static_handler.go	97.60% <0.00%> (+1.79%)	⬆️

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