Expire flyte_idt cookie at logout

[iaroslav-ciupin]

TL;DR

As discussed with @EngHabu, we need to expire flyte_idt cookie containing ID token as well during the logout.
Also, I've run make update_boilerplate.

Type

• Bug Fix
• Feature
• Plugin

Are all requirements met?

• Code completed
• Smoke tested
• Unit tests added
• Code documentation added
• Any pending items have an associated Issue

Complete description

How did you fix the bug, make the feature etc. Link to any design docs etc

Tracking Issue

Remove the 'fixes' keyword if there will be multiple PRs to fix the linked issue

fixes https://github.com/flyteorg/flyte/issues/

Follow-up issue

NA
OR
https://github.com/flyteorg/flyte/issues/

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +1.63% 🎉

Comparison is base (6f49854) 58.86% compared to head (76ed7ac) 60.49%.

❗ Current head 76ed7ac differs from pull request most recent head 3579697. Consider uploading reports for the commit 3579697 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #610      +/-   ##
==========================================
+ Coverage   58.86%   60.49%   +1.63%     
==========================================
  Files         171      171              
  Lines       16468    13435    -3033     
==========================================
- Hits         9694     8128    -1566     
+ Misses       5926     4457    -1469     
- Partials      848      850       +2     

Flag	Coverage Δ
unittests	?

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Files Changed	Coverage Δ
auth/cookie_manager.go	72.64% <100.00%> (+11.04%)	⬆️

... and 157 files with indirect coverage changes

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[EngHabu]

Thank you!