Add worker integration test with st.write_stream() to check if the co… #2620

Job	Run time
changes	6s
test-mountable	1m 11s
test-stlite-server	2m 29s
test-kernel	3m 3s
test-build-common	1m 12s
test-build-vscode-extension (macos-latest)	1m 58s
test-desktop (ubuntu-latest)	1m 26s
test-build-vscode-extension (ubuntu-latest)	1m 53s
test-sharing-common	1m 32s
test-desktop (windows-latest)	12m 30s
test-build-vscode-extension (windows-latest)	11m 33s
test-sharing-editor	1m 34s
build-sharing	6m 35s
build-mountable	6m 46s
Deploy @stlite/sharing to Cloudflare Pages	21s
publish-mountable	0s
build-sharing-editor	1m 53s
publish-vscode-extension	0s
Deploy @stlite/sharing-editor to Cloudflare Pages	23s
build-desktop	6m 12s
e2e-desktop	34s
publish-desktop	0s
	1h 3m 11s

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