[MWPW-152549] BYO SUSI Options to pass in adobeIMS.signIn()

[qiyundai]

This PR adds a new attribute in consumer miloConfigs: signInContext
The initial integration is aimed to enabled Milo consumers to pass dctx_id and use custom SUSI context. Currently Events Milo and CC has requests for this feature.

signInContext should be an object. It will be directly injected into all the adobeIMS.signIn() calls so make sure to format them correctly.

There's been some conversation for this in Slack: https://adobedotcom.slack.com/archives/C03HAU5SU2E/p1725483548242449 and a video demo has been provided in the thread.

You may also see the Milo events dev page for testing:
https://milo-susi-options--events-milo--adobecom.hlx.page/events/create-now/promotion-test/san-jose/ca/2024-09-27?timing=1727747999999&milolibs=custom-susi
Clicking the "sign in" button in gnav should take you to the T3 events SUSI experience instead of the federated one. If you don't see the sign in button, you might need to disable CORS.

Resolves: MWPW-152549

Test URLs:

• Before: https://stage--milo--adobecom.hlx.live/about/?martech=off
• After: https://custom-susi--milo--adobecom.hlx.live/about/?martech=off

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.34%. Comparing base (1bdfd4a) to head (060cf31).
Report is 9 commits behind head on stage.

Additional details and impacted files

@@           Coverage Diff           @@
##            stage    #2850   +/-   ##
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  Coverage   96.34%   96.34%           
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  Files         243      243           
  Lines       55284    55288    +4     
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+ Hits        53261    53267    +6     
+ Misses       2023     2021    -2     

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	Page	Scores	Audits	Google
📱	/about/?martech=off
🖥️	/about/?martech=off

[vhargrave]

@qiyundai looks pretty good!
I think you might have missed adding this to the jarvis-chat.js though :) . Or was that a deliberate decision?
signInProvider: () => window.adobeIMS?.signIn(getConfig().signInContext),

[vhargrave]

looks good!

[github-actions]

This PR has not been updated recently and will be closed in 7 days if no action is taken. Please ensure all checks are passing, https://github.com/orgs/adobecom/discussions/997 provides instructions. If the PR is ready to be merged, please mark it with the "Ready for Stage" label.

[github-actions]

This PR has not been updated recently and will be closed in 7 days if no action is taken. Please ensure all checks are passing, https://github.com/orgs/adobecom/discussions/997 provides instructions. If the PR is ready to be merged, please mark it with the "Ready for Stage" label.