fix(usePermission): state setting

[ferferga]

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⚠️ Slowing down new functions

Warning: Slowing down new functions

As the VueUse audience continues to grow, we have been inundated with an overwhelming number of feature requests and pull requests. As a result, maintaining the project has become increasingly challenging and has stretched our capacity to its limits. As such, in the near future, we may need to slow down our acceptance of new features and prioritize the stability and quality of existing functions. Please note that new features for VueUse may not be accepted at this time. If you have any new ideas, we suggest that you first incorporate them into your own codebase, iterate on them to suit your needs, and assess their generalizability. If you strongly believe that your ideas are beneficial to the community, you may submit a pull request along with your use cases, and we would be happy to review and discuss them. Thank you for your understanding.

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Description

As discussed in #4149 (starting from this comment), the way the state is setted in this composable is not ideal:

• If the composable failed, the state is setted as prompt, but it won't be queried again, since permissionStatus is not set to undefined. Another solution would be to remove the if from the query (I'm not sure if it's strictly necessary there).
• If permissionStatus is undefined, previously we did nothing, now we set it to 'prompt'. All of this has been refactored into an update function and simplified with the use of the finally statement.