CVE-2024-29892: ZITADEL's actions can overload reserved claims

Under certain circumstances an action could set reserved claims managed by ZITADEL.

For example it would be possible to set the claim urn:zitadel:iam:user:resourceowner:name

{"urn:zitadel:iam:user:resourceowner:name": "ACME"}

if it was not set by ZITADEL itself.

To compensate for this we introduced a protection that does prevent actions from changing claims that start with urn:zitadel:iam