Refactor Cambodia and Laos test cases #5022

Job	Run time
Run pre-commit	33s
CodeQL	1m 39s
Test Python 3.9 on macos-latest	58s
Test Python 3.10 on macos-latest	50s
Test Python 3.11 on macos-latest	38s
Test Python 3.12 on macos-latest	58s
Test Python 3.13 on macos-latest	50s
Test Python 3.9 on ubuntu-latest	1m 1s
Test Python 3.10 on ubuntu-latest	58s
Test Python 3.11 on ubuntu-latest	1m 0s
Test Python 3.12 on ubuntu-latest	1m 29s
Test Python 3.13 on ubuntu-latest	1m 14s
Test Python 3.9 on windows-latest	1m 40s
Test Python 3.10 on windows-latest	1m 44s
Test Python 3.11 on windows-latest	1m 49s
Test Python 3.12 on windows-latest	2m 49s
Test Python 3.13 on windows-latest	2m 15s
Build distribution	29s
Test docs build	38s
Test build on macos-latest	45s
Test build on ubuntu-latest	52s
Test build on windows-latest	2m 3s
Publish generated artifacts	0s
	27m 12s

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