Follow-up #926: Add the test for jupyterlab exntension build #1142

Job	Run time
lint	42s
build-python-package	4m 16s
Test build for JupyterLab extension	2m 2s
test-with-optuna-master	2m 26s
test-with-optuna-oldest	2m 17s
test (3.7, optuna>=3.1.0)	1m 18s
test (3.8, optuna>=3.1.0)	2m 17s
test (3.9, optuna>=3.1.0)	5m 11s
test (3.10, optuna>=3.1.0)	2m 22s
test (3.11, optuna>=3.1.0)	2m 18s
	25m 9s

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