combobox 🚸 tweaks for single select

[JulianNymark]

Description

Closes https://github.com/navikt/team-aksel/issues/577
This + #3071 Closes #2891

Change summary

• hide the selected value when inputing text
• delete input value on blur (you must actually select something with intent to select it, this prevents the field from "looking like it's filled in when it's actually not")

Versioning 🏷️

• Run yarn changeset to generate a version-entry for change.
• • Bug/hotfix: Patch

[changeset-bot]

🦋 Changeset detected

Latest commit: e3f1b0c

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 7 packages

Name	Type
@navikt/ds-react	Patch
@navikt/ds-css	Patch
@navikt/ds-tokens	Patch
@navikt/ds-tailwind	Patch
@navikt/aksel-icons	Patch
@navikt/aksel	Patch
@navikt/aksel-stylelint	Patch

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[github-actions]

Storybook demo

Endringer til review: 5

8cd4ca0bc | 88 komponenter | 139 stories

[KenAJoh]

Seems like filtered search is preserved onBlur, making previous search like "app" be the default after re-entering the field.
https://github.com/user-attachments/assets/c5a8f201-b685-4116-8cb2-0fe21e5abcbf

Reproduce:

• "Default" combobox-story
• write and select "banana"
• write "app"
• tab -> shift + tab to blur -> re-enter field
• now shows results for "app" again

[JulianNymark]

Seems like filtered search is preserved onBlur, making previous search like "app" be the default after re-entering the field. https://github.com/user-attachments/assets/c5a8f201-b685-4116-8cb2-0fe21e5abcbf

Reproduce:

* "Default" combobox-story

* write and select "banana"

* write "app"

* tab -> shift + tab to blur -> re-enter field

* now shows results for "app" again

nice catch! (turns out I shouldn't have shied away from clearInput(), for some reason I thought it was going to clear the selected options, but it's actually exactly what I wanted here.)