Bump stylelint from 13.13.1 to 14.2.0 (#7431)

* Bump stylelint from 13.13.1 to 14.2.0

Bumps [stylelint](https://github.com/stylelint/stylelint) from 13.13.1 to 14.2.0.
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/main/CHANGELOG.md)
- [Commits](https://github.com/stylelint/stylelint/compare/13.13.1...14.2.0)

---
updated-dependencies:
- dependency-name: stylelint
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* upgrade to newest stylelint

* fix style issues

* fix color function rules to match old Angular

* rollback modern color func

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Denys Vuika <denys.vuika@gmail.com>

lib/core/styles/_index.scss

@@ -1,10 +1,14 @@
+/* stylelint-disable value-keyword-case */
+/* stylelint-disable value-list-max-empty-lines */
+/* stylelint-disable scss/no-global-function-names */
+/* stylelint-disable scss/at-import-partial-extension */
 @import './default-class';
 @import './theming';
 @import '../form/components/widgets/form.theme';
 @import '../clipboard/clipboard.theme';
 @import './snackbar.theme';
 @import './material.theme';
-@import '~@mat-datetimepicker/core/datetimepicker/datetimepicker-theme.scss';
+@import '~@mat-datetimepicker/core/datetimepicker/datetimepicker-theme';
 
 @mixin alfresco-material-theme($theme) {
     @include adf-core-theme($theme);
@@ -98,11 +102,11 @@
     // propagates SCSS variables into the CSS variables scope
     :root {
         @each $name, $value in $defaults {
-        #{$name}: #{$value};
+            #{$name}: #{$value};
         }
     }
 
     @include mat-datetimepicker-theme($theme);
-    @include adf-snackbar-theme();
-    @include adf-material-theme();
+    @include adf-snackbar-theme;
+    @include adf-material-theme;
 }