change okteto destroy --all option description to fit new behavour

[teresaromero]

Related to this change https://github.com/okteto/app/pull/8275

okteto destroy --all triggers the namespace-destroy-all which did not had the annotation skip logic. With the change this is introduce so the flag now will skip the resources with the annotation as described on the PR

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[ifbyol]

Be aware that we need to wait until 1.22 release is done to merge this, as this won't be part of the ongoing release

[codyjlandstrom]

Marking as draft to prevent accidental merge

[ifbyol]

This can now be merged as we already merged the 1.22 release docs cc @teresaromero @codyjlandstrom