CAMARA-API-access-and-user-consent.md aligment with last decisions made in profile

[jpengar]

What type of PR is this?

• cleanup
• documentation

What this PR does / why we need it:

Clean up and update the CAMARA-API-access-and-user-consent.md document to reflect the latest profile decisions and/or to include references(*) to the new CAMARA-Security-Interoperability.md profile document where appropriate.

Which issue(s) this PR fixes:

Fixes #154
Fixes #131

Special notes for reviewers:

• @hdamker Please review, because I think this PR would be fixing issue Inconsistent statements about applicable authorization flows #131 as well.
• Please, reviewers are encouraged to review the PR content considering the scope of the issue(s) being addressed. If there is another topic related to the document that someone needs to discuss, please open a new issue to address it if it does not already exist.

Changelog input

 `CAMARA-API-access-and-user-consent.md` aligment with profile 

Additional documentation

N/A

[jpengar]

As mentioned in the ICM meeting on 22nd May, I would like to close this PR that was opened last week (16/05), and to do so a reasonable deadline will be set for receiving further comments. So if there is no feedback until 29/05 (end of day), I will merge the PR. Please review.

[jpengar]

Thanks @sebdewet for your review!
I'm merging this PR as we've already passed the deadline. No further comments were received.

[hdamker]

@jpengar changes are looking good to me as well. Just the remark that all references to https://github.com/camaraproject/IdentityAndConsentManagement/blob/main/documentation/CAMARA-Security-Interoperability.md should be in the in the released version to the concrete release. Maybe a relative link could be an alternative: ./CAMARA-Security-Interoperability.md as it will point always to the same tree? But have not tested it.