Support VS Code proxy settings

[JillieBeanSim]

With the added support in Zowe CLI we can adopt the use and passage of VS Code proxy setting

Additional context

[github-actions]

Thank you for raising this enhancement request.
The community has 90 days to vote on it.
If the enhancement receives at least 10 upvotes, it is added to our development backlog.
If it receives fewer votes, the issue is closed.

[JillieBeanSim]

waiting on publish including zowe/zowe-cli#2205 to export the new Proxy class from imperative

[JillieBeanSim]

OUTDATED

Created Zowe CLI PR that will add ability to pass proxy object to rest calls that isn't set as an environment variable or can take precedence over envars, ProxyVariables

{
    http_proxy: string,
    https_proxy: string,
    no_proxy: string[]
}

Will begin work on ZE so they can be tested together

[JillieBeanSim]

Zowe CLI work zowe/zowe-cli#2330