ROX-13408: Use api.iam.clients in dynamic clients API wrapper

[ivan-degtiarenko]

Description

Switch to explicitly requesting api.iam.clients scope when getting token for sso.redhat.com dynamic clients API. Currently, the scope is being returned by default.

Checklist (Definition of Done)

• Unit and integration tests added
• Added test description under Test manual
• Evaluated and added CHANGELOG.md entry if required
• Documentation added if necessary (i.e. changes to dev setup, test execution, ...)
• CI and all relevant tests are passing
• Add the ticket number to the PR title if available, i.e. ROX-12345: ...
• Discussed security and business related topics privately. Will move any security and business related topics that arise to private communication channel.

Test manual

1. Created local fleet-manager with dynamic client configuration
2. POST new central
3. Verified that db contains central with client id and client secret

[openshift-ci]

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ivan-degtiarenko, rukletsov

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[ivan-degtiarenko]

/retest