Fix and test validation of IDCID length #4675

Job	Run time
lint	56s
msrv	28s
audit	23s
features (ubuntu-latest)	4m 53s
test (ubuntu-latest, stable)	1m 11s
features (macos-latest)	3m 47s
test (ubuntu-latest, beta)	1m 12s
test-android (x86_64-linux-android, x86_64, 26)	3m 45s
features (windows-latest)	8m 22s
test on freebsd	5m 7s
test (macos-latest, stable)	49s
test-android (i686-linux-android, x86, 26)	3m 35s
test (windows-latest, stable)	2m 35s
	37m 3s

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