Updated the script used to do container scans, as the scanner has changed

[dmereszMS]

I have updated the script to work with the new scanner that Defender is using - this meant changes in the query.
I've also removed the patchable parameter as we no longer have it - and changed it to the FixAvailable parameter. I haven't added a parameter yet to make it optional.
Also fixed some typos.

[dmereszMS]

@microsoft-github-policy-service agree company="Microsoft"

[TomJanetscheck]

Adding @wtomw as script owner to review this PR

[killnine]

Is there any way to move forward on this? My build pipelines have broken and I had to stop using these scans since the Defender changes.

I could copy-paste this but would prefer that the team agree this is the right way to move forward first.