Fix resource cleanup for multiple stacks

[msannan2]

BACKGROUND

• Some kubernetes stacks do not have an uninstall script, causing some resources to remain on the cluster during the addon testing jobs runs
• Some uninstall scripts fail which again, prevents cleanup of the resources provisioned by the stack

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Changes

• Added uninstall scripts to jaeger and victoria-metrics-server
• Fixed existing uninstall scripts
• Updated deploy scripts to use dedicated namespaces rather the default namespace

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Reviewer: @marketplace-eng

[scott]

LGTM 👍

[github-actions]

👋 @msannan2
If this is an EXISTING Marketplace app, now that the PR is merged, all new users of your app will get the current version. You should visit the Vendor Portal to make sure you update any version numbers, Description, or Getting Started information that are related to the merged PR.
If this is a BRAND NEW Marketplace app, before this app update can go live on the Marketplace, please update and submit your app from the Vendor Portal.
Thanks!