test: add tests for governance modifiable params #2926

Job	Run time
goreleaser / goreleaser-check	7s
lint / golangci-lint	1m 10s
lint / yamllint	8s
markdown-linter / markdown-link-check	1m 29s
markdown-linter / markdown-lint	7s
test / test	8m 17s
test / test-coverage	3m 16s
test / test-fuzz	12m 34s
test / test-race	6m 10s
test / test-short	1m 32s
lint / hadolint / hadolint	7s
goreleaser / goreleaser	0s
	34m 57s

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