Make ovs-vswitchd service 'other_config' option configurable

[e0ne]

This is a backport k8snetworkplumbingwg#823. We need this one for an internal release until community approves a PR

[github-actions]

Thanks for your PR,
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  Best regards.

[ykulazhenkov]

Do we really want such a default at the API level?
If I understand correctly, this means that if a user sets ovsConfig = {"foo":"bar"}, then the default will not apply.
This may be confusing. Should we instead always add {hw-offload: "true"} to the ovsConfig value when it doesn't contain an explicit value for this field?

[e0ne]

I would like to keep default behaviour as is now. Always add {hw-offload: "true"} could be non-obvious for users, so I prefer user add this option if needed

[ykulazhenkov]

Overall, the code looks good. Are the CI failures expected?

[e0ne]

Overall, the code looks good. Are the CI failures expected?

I re-run test-coverage job - it should pass. Other failures are expected in this fork repo

[coveralls]

Pull Request Test Coverage Report for Build 14443961186

Details

• 93 of 159 (58.49%) changed or added relevant lines in 9 files are covered.
• 5 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.05%) to 61.632%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/render/render.go	16	18	88.89%
pkg/plugins/k8s/k8s_plugin.go	16	29	55.17%
pkg/host/mock/mock_host.go	0	24	0.0%
pkg/host/internal/service/service.go	14	41	34.15%

Files with Coverage Reduction	New Missed Lines	%
pkg/plugins/k8s/k8s_plugin.go	2	76.11%
pkg/daemon/daemon.go	3	44.69%

Totals
Change from base Build 14392662641:	0.05%
Covered Lines:	8594
Relevant Lines:	13944

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💛 - Coveralls