bug(mdc-migration): Snackbar migration doesn't migrate 'mat-simple-snackbar-action' class

[michaelfaith]

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

After running the MDC Migration, I noticed the mat-simple-snackbar-action class wasn't migrated to the new mdc class. I believe it should be mat-mdc-snack-bar-action. I confirmed it doesn't appear to be in the map used in the schematic config:

components/src/material/schematics/ng-generate/mdc-migration/rules/components/snack-bar/snack-bar-styles.ts

Line 36 in 2629047

classChanges: ClassNameChange[] = [

Not sure if that class just isn't considered official public API or not. We're using it to override the action button color, and noticed it didn't get migrated.

Reproduction

Steps to reproduce:

1. Run Snackbar migration on app with overrides to .mat-simple-snackbar-action

Expected Behavior

Migrate to .mat-mdc-snack-bar-action

Actual Behavior

Left the class alone

Environment

• Angular: 15.0.0
• CDK/Material: 15.0.0
• Operating System (e.g. Windows, macOS, Ubuntu): Windows 10

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