Update module github.com/knadh/koanf/v2 to v2.0.2 #17400

Job	Run time
setup-environment	40s
govulncheck	59s
checks	1m 59s
unittest-matrix (~1.21.5)	4m 34s
lint	3m 9s
unittest-matrix (~1.20.12)	4m 7s
cross-build-collector (darwin, amd64)	38s
test-coverage	4m 25s
cross-build-collector (darwin, arm64)	44s
cross-build-collector (linux, 386)	36s
cross-build-collector (linux, amd64)	45s
cross-build-collector (linux, arm64)	46s
cross-build-collector (linux, ppc64le)	35s
cross-build-collector (linux, arm, 7)	44s
cross-build-collector (linux, s390x)	40s
cross-build-collector (windows, 386)	41s
cross-build-collector (windows, amd64)	42s
unittest	1s
	26m 45s

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