fix(@schematics/angular): correct configure the typeSeparator in the library schematic

Prior to this the `typeSeparator` could have been inherited from the workspace setting which would cause the file references to be incorrect.

Closes #30886

(cherry picked from commit e46d9c5)

Author: alan-agius4

packages/schematics/angular/library/index.ts

@@ -198,6 +198,9 @@ export default function (options: LibraryOptions): Rule {
             flat: true,
             path: sourceDir,
             project: packageName,
+            // Explicitly set the `typeSeparator` this also ensures that the generated files are valid even if the `module` schematic
+            // inherits its `typeSeparator` from the workspace.
+            typeSeparator: '-',
           }),
       schematic('component', {
         name: options.name,