Datasource ignoring env proxy settings again (exactly like in issue #52)

[thielela]

Describe the bug
It worked fine for a while with Grafana 9.3 and Version 3.1.0-rc1,
but after update to 10.4 we get exactly the same error "Get "https://cloud.mongodb.com/api/atlas/v1.0/": dial tcp: lookup cloud.mongodb.com on 127.0.0.1:53: no such host" again, like in issue #52.

Looks like the plugin ignores the proxy setting again and tries local DNS instead of proxy DNS.

To Reproduce
see
#52

Expected behavior
see
#52
The Proxy DNS should be used instead of local DNS.

Screenshots
see
#52

Desktop (please complete the following information):

• OS: RHEL 8.9
• Grafana: 10.4.0
• Version: [3.1.0-rc1]