fix: Fix UserIri and allow existing values (DEV-3194)

[seakayone]

Pull Request Checklist

Task Description/Number

This PR depends on #2996 being merged first.

Widen the allowed range of UserIris to account for existing iris in our database

• Allows for builtIn UserIris
• Regular UserIris start with http://rdfh.ch/users/ and then an alphanumeric String containing - or _ is allows, length >=4 and <=36 charaters
• Adds isBuiltInUser and isRegularUser extension methods to UserIri
• Moves creating a new UserIri from the StringFormatter to UserIri.makeNew
• Migrates the DELETE admin/users/iri/{userIri} route to tapir

PR Type

• build/chore: maintenance tasks (no production code change)
• docs: documentation changes (no production code change)
• feat: represents new features
• fix: represents bug fixes
• perf: performance improvements
• refactor: represents production code refactoring
• test: adding or refactoring tests (no production code change)

Basic requirements for bug fixes and features

• Tests for the changes have been added
• Docs have been added / updated

Does this PR introduce a breaking change?

• Yes

Does this PR change client-test-data?

• Yes

[linear]

DEV-3194 dsp-api: Fails to load all project members of the BEOL project

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (eac5751) 11.74% compared to head (c2a1109) 11.64%.
Report is 24 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2997      +/-   ##
==========================================
- Coverage   11.74%   11.64%   -0.10%     
==========================================
  Files         246      259      +13     
  Lines       22907    23094     +187     
==========================================
- Hits         2690     2689       -1     
- Misses      20217    20405     +188     

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[mpro7]

LGTM. Both suggestions below can be applied separately to have this merged ASAP and release.