fix: ignore error when input artifacts optional. Fixes #13564 #22736

Job	Run time
Get changed files	4s
argo-images (argoexec)	3m 6s
argo-images (argocli)	5m 2s
Unit Tests	4m 44s
Windows Unit Tests	13m 12s
Codegen	0s
Lint	3m 55s
UI	0s
E2E Tests (test-executor, minimal)	14m 17s
E2E Tests (test-corefunctional, minimal)	13m 35s
E2E Tests (test-functional, minimal)	21m 2s
E2E Tests (test-api, mysql)	8m 37s
E2E Tests (test-cli, mysql)	12m 12s
E2E Tests (test-cron, minimal)	22m 52s
E2E Tests (test-examples, minimal)	6m 25s
E2E Tests (test-plugins, plugins)	3m 56s
E2E Tests (test-java-sdk, minimal)	4m 3s
E2E Tests (test-python-sdk, minimal)	3m 13s
E2E Tests (test-executor, v1.28.11+k3s1, minimal)	13m 48s
E2E Tests (test-corefunctional, v1.28.11+k3s1, minimal)	13m 40s
E2E Tests (test-functional, v1.28.11+k3s1, minimal)	20m 55s
E2E Tests - Composite result	1s
	3h 8m 39s

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