Prevent WAPI errors thrown during pipeline processing from terminating the pipeline

[rmbolger]

Due to the way errors are currently handled, when processing multiple operations using pipeline input to various functions, an error thrown by one WAPI call will terminate the processing of the rest of the pipeline. Instead, it should emit an error record for that call and continue processing which is how pipeline operations generally work in PowerShell.

This would technically be a breaking change and should be deferred until the next major version release.

[rmbolger]

This is now being tested in the 4x branch.