Add support to create and visualize CSI volume snapshots

[qiell]

This PR will

• Bump up the dependency to release-1.19 of client-go, api and apimachinery
• Add client of CSI snashot
• Add support to visualize VolumeSnapshot, VolumeSnapshotClass and VolumeSnapshotContent
• Add support to create CSI based snapshot from PVC
• Add support to clone CSI volume snapshot
• Add adjacency between PV and CSI volume snapshot
• Add adjacency between CSI VolumeSnapshot, VolumeSnapshotClass and VolumeSnapshotContent
• Add adjacency between VolumeSnapshot and it's cloned PVC

[coveralls]

Pull Request Test Coverage Report for Build 2356

• 103 of 539 (19.11%) changed or added relevant lines in 16 files are covered.
• 4718 unchanged lines in 7 files lost coverage.
• Overall coverage increased (+0.08%) to 26.738%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
render/filters.go	0	3	0.0%
probe/kubernetes/persistentvolumeclaim.go	0	4	0.0%
probe/kubernetes/storageclass.go	0	4	0.0%
probe/kubernetes/blockdevice.go	0	9	0.0%
probe/kubernetes/volumesnapshotclass.go	0	11	0.0%
probe/kubernetes/volumesnapshotcontent.go	0	11	0.0%
render/detailed/summary.go	0	15	0.0%
probe/kubernetes/reporter.go	47	65	72.31%
probe/kubernetes/csivolumesnapshot.go	0	27	0.0%
render/persistentvolume.go	10	42	23.81%
<!--	Total:	103	539	19.11%	-->

Files with Coverage Reduction	New Missed Lines	%
probe/kubernetes/persistentvolumeclaim.go	1	0%
probe/kubernetes/client.go	2	0%
probe/appclient/app_client.go	4	41.97%
prog/externalui/externalui.go	41	0%
prog/staticui/staticui.go	41	0%
render/detailed/detailed.codecgen.go	1908	28.27%
report/report.codecgen.go	2721	35.01%
<!--	Total:	4718		-->

Totals
Change from base Build 2280:	0.08%
Covered Lines:	15166
Relevant Lines:	56720

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💛 - Coveralls