fix: support VP without VCs in IdentityAndTrustService (#4818) #13568

Job	Run time
Checkstyle	4m 42s
Javadoc	7m 30s
Unit-Tests	11m 23s
API-Tests	8m 2s
Component-Tests	11m 56s
End-To-End-Tests	17m 50s
Postgresql-Integration-Tests	11m 6s
Verify-OpenApi	0s
CodeQL / Analyze (java)	12m 37s
	1h 25m 6s

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