Automatic node install wizard is not able to validate connectivity when IP pinning is enabled

[webvictim]

Expected behavior

When running the Server "Test Connection" wizard in the web UI, this flow should complete successfully if the user's role has spec.options.pin_source_ip: true

Current behavior

The "Test Connection" step fails with the error error reading server preface: EOF

If it's not possible to fix this, we should squash or otherwise filter the error.

Connectivity works fine from the CLI after running tsh ssh <user>@<host>.

Auth server logs report:

May 16 18:40:06 ip-172-31-3-140.ec2.internal teleport[3726]: 2024-05-16T18:40:06Z WARN [PROXY:SER] pinned IP doesn't match observed client IP pid:3726.1 authz/permissions.go:562

Bug details:

• Teleport version: 15.3.4