fix: artifact subdir error when using volumeMount #20382

Job	Run time
argoexec-image	33s
Get changed files	5s
Lint	4m 0s
Windows Unit Tests	6m 41s
Unit Tests	4m 32s
Codegen	0s
UI	0s
E2E Tests (test-executor, minimal)	13m 37s
E2E Tests (test-corefunctional, minimal)	12m 56s
E2E Tests (test-functional, minimal)	19m 44s
E2E Tests (test-api, mysql)	6m 53s
E2E Tests (test-cli, mysql)	11m 26s
E2E Tests (test-cron, minimal)	6m 40s
E2E Tests (test-examples, minimal)	6m 31s
E2E Tests (test-plugins, plugins)	4m 10s
E2E Tests (test-java-sdk, minimal)	3m 38s
E2E Tests (test-python-sdk, minimal)	3m 25s
E2E Tests (test-executor, v1.25.11-k3s1, minimal)	13m 27s
E2E Tests (test-corefunctional, v1.25.11-k3s1, minimal)	12m 39s
E2E Tests (test-functional, v1.25.11-k3s1, minimal)	19m 27s
E2E Tests - Composite result	1s
	2h 30m 25s

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