Fix OrderedNamespaceSet.setitem slice assigns exhausted iterator #1143

Job	Run time
sdk-test (3.10)	34s
sdk-package	17s
compliance-tool-package	22s
repository-check-copyright	17s
server-static-analysis	34s
check-python-versions	8s
compliance-tool-test (3.12)	41s
compliance-tool-test (3.10)	34s
sdk-readme-codeblocks	25s
compliance-tool-static-analysis	22s
sdk-docs	32s
sdk-test (3.12)	32s
server-repository-docker	54s
sdk-static-analysis	33s
	6m 45s

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