Feature/add new dbops plugin

[pmazumda]

dbops kubectl plugin

This is a kubectl plugin that allows us to interact with an MSSQL db server running inside a Kubernetes cluster. It supports taking database backups, listing databases, listing backup files, and connecting to the SQL prompt.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: pmazumda / name: Pinak Mazumdar (be772d7, 6ce97e8, 34b9235, ef32800, 4242e67, ddb91c6, 28dada2, 58b8a89, 710d69f, eb2358c)

[ahmetb]

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/kind new-plugin

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