Memory leak when using asp-append-version with href pointing to non-existent file

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Describe the bug

Using the asp-append-version attribute (from the LinkTagHelper) on a element with an href pointing to a file which does not exist sets up a memory leak. The memory leak is revealed when a WebApplicationFactory is used to host the app and the app is repeatedly started up and shutdown with the page being requested in between.

### Expected Behavior

asp-append-version should just ignore files which do not exist, and no memory leak should result.

### Steps To Reproduce

Here is a minimal example which reproduces this issue: https://github.com/samueldjack/LinkTagHelperMemoryLeak

The essence: an MVC app where the View contains a ``

In a Test, WebApplicationFactory is used to repeatedly create instances of the web app, call the page, then dispose of the app.

The process eventually crashes with an OutOfMemoryException.

If the ```asp-append-version``` attribute is removed, no memory leak occurs.

### Exceptions (if any)

_No response_

### .NET Version

_No response_

### Anything else?

This is present on .Net 8 and .Net 9