draft - Introspect with org ctx

[EriksonBahr]

Description

Fix for the headers too large error by limiting the HSDP IAM introspection scope to the current org. This is a proposal/draft and still needs to be evaluated if it actually cover our use case with sub orgs.

For now management decided this should be on hold for 2~4 weeks.

In order to adopt this fix I changed our own envoy config so the orgId is added:

library.setOrgIdInHeader(request_handle, ${ORG_ID_MAPPING}, {})
-- ... next filter:
- exact: "edisp-org-id"

Motivation and Context

How Has This Been Tested?

Checklist:

• My change requires a change to the documentation or CHANGELOG.
• I have updated the documentation/CHANGELOG accordingly.
• I have created a feature (non-master) branch for my PR.
• Add unit tests
• Local testing