cannot fetch instance information warning message not helpful

[Jeff Pihach]

When bootstrapping a new controller I had the following warning message. As the user I have no information if this warning is something I should be concerned about or how to go about investigating the issue.

I'd propose one of the following options:
- Hiding the message completely behind a debug flag.
- Do not show the message unless the request fails some number of times.
- And adding a resolution message. "Instance ID .... now found"

Creating Juju controller "50qa" on aws/us-east-1
Looking for packaged Juju agent version 2.8.7 for amd64
Launching controller instance(s) on aws/us-east-1...
WARNING cannot fetch instance information: The instance ID 'i-0058f56dfab0bf7e0' does not exist (InvalidInstanceID.NotFound)
 - i-0058f56dfab0bf7e0 (arch=amd64 mem=8G cores=2)

[Ian Booth (wallyworld)]

Can be looked at along with https://bugs.launchpad.net/bugs/1914098

[Achilleas Anagnostopoulos (achilleasa)]

PR https://github.com/juju/juju/pull/12681 tackles this as a drive-by

[Achilleas Anagnostopoulos (achilleasa)]

The fix has been forward-ported to 2.9