Remove Warning and add notice for Navigation

[AKSHAT2802]

Fixes #59785

[github-actions]

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Co-authored-by: Mamaduka <mamaduka@git.wordpress.org>
Co-authored-by: afercia <afercia@git.wordpress.org>

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[afercia]

@AKSHAT2802 thanks for working on this and sorry for the late review. In the issue #59785 I proposed to change only the Warning in the Inspector panel, while this PR changes also the one in the editor canvas. Screenshot:

Also, I'd agree with @Mamaduka that the Notice should not be dismissible.

Could you please have a look and address both points, when you have a chance?

[AKSHAT2802]

Hey @afercia, Addressed both points and updated my PR.
As both the editor and inspector panel deleted navigation warning renders one file, I added a prop named isNotice and passed it true while triggering for the inspector panel.

This will only change the warning to a non-dismissable notice for the inspector panel.
I have verified that the deleted navigation warning only appears in 2 files one in the editor and the second in inspector control.
PFA: Screenshot attached

[afercia]

@AKSHAT2802 thanks for the update and the screenshot. Looks good to me, I'd only reduce doce duplication. See inline comment.

[AKSHAT2802]

Thanks for the review @afercia & @Mamaduka
I have added a commit to reduce duplication.

[afercia]

@AKSHAT2802 thank you. LGTM to me. Can be merged when all tests pass.