bug(cdk/schematics): ng update migration does not find the global stylesheet.

[sandeeppatidar30]

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

NIL

Description

@angular/cdk/schematics does not find all the stylesheets in a workspace. We are overrding visitStylesheet method of DevkitMigration but global stylesheets are not getting detected.

Even ng update @angular/cdk@13.0 does not run TildeImportMigration for global stylesheets.

Reproduction

Steps to reproduce:

1. ng update @angular/cdk@13.0`

Expected Behavior

It should run TildeImportMigration for global stylesheets.

Actual Behavior

It does not run TildeImportMigration for global stylesheets.

Environment

• Angular: 13.1.0
• CDK/Material:13.1.0
• Browser(s): chrome
• Operating System (e.g. Windows, macOS, Ubuntu): Windows 10