Tests

native: add test for custom Koblitz witness verification script #1067

Job	Run time
CodeQL (go)	2m 50s
Check code generated with 'go generate' is up-to-date	39s
Check internal dependencies	4s
Lint	1m 3s
Coverage	6m 23s
Run tests (ubuntu-22.04, 1.20)	7m 40s
Run tests (ubuntu-22.04, 1.21)	6m 46s
Run tests (windows-2022, 1.22)	19m 40s
Run tests (macos-12, 1.22)	19m 8s
Run tests (macos-14, 1.22)	15m 52s
	1h 20m 5s

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