Fix image attachment race condition and path issues [codecane] #5570

Job	Run time
build-and-check	2m 41s
test-integration-packages/internal	1m 6s
test-integration-packages/billing	1m 1s
test-integration-packages/agent-runtime	37s
test-integration-cli	47s
test-integration-sdk	48s
test-integration-web	46s
test-integration-common	39s
test-common	48s
test-.agents	46s
test-sdk	46s
test-packages/internal	46s
test-packages/agent-runtime	58s
test-packages/billing	47s
test-cli	1m 16s
test-web	44s
	15m 16s

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