fix(dropdown): add negative offset to item focus outline (#1454)

## PR Checklist

Please check if your PR fulfills the following requirements:

- [ ] Tests for the changes have been added (for bug fixes / features)
- [ ] Docs have been added / updated (for bug fixes / features)
- [ ] If applicable, have a visual design approval

## PR Type

What kind of change does this PR introduce?

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- [X] Bugfix
- [ ] Feature
- [ ] Code style update (formatting, local variables)
- [ ] Refactoring (no functional changes, no api changes)
- [ ] Build related changes
- [ ] CI related changes
- [ ] Documentation content changes
- [ ] Other... Please describe:

## What is the current behavior?

Focus outline is hard to be seen in tab overflow due to being cut

<!-- Please describe the current behavior that you are modifying, or
link to a relevant issue. -->

Issue Number: N/A

## What is the new behavior?

Outline have offset and it's clearly visible

## Does this PR introduce a breaking change?

- [ ] Yes
- [X] No

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and migration path for existing applications below. -->

## Other information

projects/angular/src/popover/dropdown/_dropdown.clarity.scss

@@ -176,6 +176,9 @@
  }
  }
  }
+ &:focus {
+ outline-offset: calc(-1 * tokens.$cds-global-space-2);
+ }
  }
 
  .btn,