[Bug]: SP-MENU-ITEM href, target="_blank" opening same tab twice when mouse clicked

### Code of conduct

- [x] I agree to follow this project's code of conduct.

### Impacted component(s)

sp-menu-item

### Library version

@spectrum-web-components/1.7.0

### Expected behavior

In Chrome, with `Pop-ups and redirects` enabled, clicking a `sp-menu-item` with href _and_ `target="_blank"` should open a single tab.

This is similar to the issue that was fixed in April 2025: https://github.com/adobe/spectrum-web-components/issues/5203.

### Actual behavior

In Chrome, with `Pop-ups and redirects` enabled, clicking a `sp-menu-item` with href _and_ `target="_blank"` opens two tabs.

### Screenshots

_No response_

### What browsers are you seeing the problem in?

Chrome

### How can we reproduce this issue?

In Chrome, allow sites to send pop ups.

1. In Mac Chrome 140.0.7339.132, open settings.
1. Search for `site settings`
1. Click on `Pop-ups and redirects`
1. Click `Sites can send pop-ups and use redirects`

Now add `target="_blank"`
1. Go to menu-item.stories and add `target="_blank"` [here](https://github.com/adobe/spectrum-web-components/blob/main/packages/menu/stories/menu-item.stories.ts#L152-L154).
1. Run `yarn storybook`
1. Open `Menu Item` story and click the changed menu item.

### Sample code or abstract reproduction which illustrates the problem

_No response_

### Severity

None

### Logs taken while reproducing problem

_No response_

### Would you like to track this issue in Jira?

- [x] Yes, please tell me the ticket number!

Start with packages/menu/stories/menu-item.stories.ts at the linked menu-item example, run yarn storybook, and reproduce the Chrome behavior with href and target="_blank". Compare the related issue 5203 while tracing sp-menu-item's click handling; done means the example opens exactly one tab in the stated Chrome setup.

Written by the indexing model from the issue text.