Install-DbaMaintenanceSolution can't remove jobs when -SqlCredential is used

[nvarscar]

Before submitting a bug report:

• Ensure you are able to reproduce it on the latest released version (we release often)
• Verified this bug is not already reported in an issue
• Verified errors are not related to permissions
• Can reproduce in a clean PowerShell session (clean = powershell -NoProfile)

Steps to Reproduce

$cred = Get-Credential
# server1 is a docker container, no SSPI auth
'server1' | Install-DbaMaintenanceSolution -SqlCredential $cred -ReplaceExisting -BackupLocation /backups -InstallJobs

Expected Behavior

Run without errors

Actual Behavior

Details

Calls to Agent commands don't inherit $SqlCredential variable.