Fix LocalFileIdentifiableStore: count and iterate only .json store fi… #1220

Job	Run time
sdk-docs	21s
sdk-static-analysis	28s
sdk-test (3.12)	29s
repository-check-copyright	11s
sdk-readme-codeblocks	21s
compliance-tool-package	12s
server-static-analysis	30s
sdk-package	13s
compliance-tool-static-analysis	24s
server-repository-docker	53s
sdk-test (3.10)	31s
check-python-versions	8s
	4m 41s

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