AzureIDIR (IDIR MFA) support

[norrisng-bc]

Description

This PR introduces full support for IDIR MFA (a.k.a. azureidir) as an identity provider, alongside the existing SiteMinder IDIR (or idir).

Partial support was already available in the local dev environment, but behaviour was buggy. Some examples of this include:

• A user logging in via IDIR MFA wouldn't be treated as an elevated user (resulting in a slightly restricted feature set)
• Permissions assigned to an idir user didn't carry over to the azureidir-equivalent user
• And despite this distinction, the BCBox UI didn't expose the underlying IDP, resulting in potential confusion (e.g. a user search returning multiple seemingly identical results)

Similar to the COMS-side changes made to enable IDIR MFA (bcgov/common-object-management-service#320), this was achieved by 'coercing' authStore.profile.identity_provider to idir whenever azureidir was present in the corresponding JWT field.

https://apps.nrs.gov.bc.ca/int/jira/browse/SHOWCASE-3713

Types of changes

New feature (non-breaking change which adds functionality)

Checklist

• I have read the CONTRIBUTING doc
• I have checked that unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

See also: bcgov/common-object-management-service#320

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