perf: updated cohesion id stitching script

[ayesha-waris]

INF-1676

Description
In the Authn MFE, we need to send a Segment Identify call that includes the Cohesion anonymous_id as a trait so that Segment is able to map Cohesion’s server-side events with Segment’s client-side events on the same page.

In the integration doc, there is a snippet of code that needs to be added to the already-existing code in Authn MFE to send Identify calls to Cohesion.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.96%. Comparing base (1477ed3) to head (9795989).
Report is 11 commits behind head on 2u-main.

Additional details and impacted files

@@             Coverage Diff             @@
##           2u-main    #1358      +/-   ##
===========================================
- Coverage    86.57%   85.96%   -0.61%     
===========================================
  Files          134      140       +6     
  Lines         2413     2465      +52     
  Branches       669      673       +4     
===========================================
+ Hits          2089     2119      +30     
- Misses         311      331      +20     
- Partials        13       15       +2     

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