[UT] Remove Azure network dependency from filesystem cache test #55118

Job	Run time
clean_ci_workflow	3s
Backport Fan-out (dry-run shadow)	0s
thirdparty-filter	-1s
update_backport_merged_msg	-1s
backport	-1s
Thirdparty Update Image	-1s
update_feature_issue	-1s
update_version_label_for_main_feature	-7s
merge_testcase	-8s
close_msg	-9s
	-26s

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