[PreviewAction] Use API instead of importing PreviewAction.js

[jvigliotta]

Is your feature request related to a problem? Please describe.

We need to be using our own API functions when possible. A current example of where this needs to be done, is using PreviewAction.js instead of our ActionsAPI.

This is a general search for where it's being misused (ignoring it's own plugin)
https://github.com/search?q=repo%3Anasa%2Fopenmct%20import%20PreviewAction&type=code

Describe the solution you'd like

Replace direct usage of the PreviewAction.js class and use the ActionsAPI version.

Describe alternatives you've considered

The alternative is what's currently being done, we need to get away from that.

Additional context

Example:
Not using API
https://github.com/nasa/openmct/blob/master/src/plugins/LADTable/components/LadRow.vue#L64
https://github.com/nasa/openmct/blob/master/src/plugins/LADTable/components/LadRow.vue#L239-L273

Using the API we can remove the import and replace this line: https://github.com/nasa/openmct/blob/master/src/plugins/LADTable/components/LadRow.vue#L239

with

this.previewAction = this.openmct.actions.getAction('preview');

[ozyx]

dupe of #6426