Azure privatelink integration is impossible

[omelchukvladyslav]

Describe the bug
We are not able to use Azure keyvault privatelink integration due to hardcoded values in Azure backend, so we are able only to provide the name of keyvault so the path is different than privatelink endpoint

To Reproduce
kvpath = fmt.Sprintf("https://%s.vault.azure.net", kvpath)

Expected behavior
Be able to use privatelink endpoint for keyvault - .privatelink.vaultcore.azure.net

Screenshots/Verbose output

[werne2j]

So i guess we would just need to accept an environment variable and override if provided. Feel free to put up a PR and we can review if this is a feature you need. Thanks!