Restructures v10 upgrade guidance

[milanholemans]

Closes #6363

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Let's not forget to update the release blog since this change will break some of its link anchors.

[Adam-it]

LGTM 👍

[Adam-it]

Ready to merge 🚀
On hold till I update the release blog post

[Adam-it]

@milanholemans I rechecked the release blog post and we use the following links to upgrade guidance
https://pnp.github.io/cli-microsoft365/v10-upgrade-guidance#updated-command-spo-file-move
https://pnp.github.io/cli-microsoft365/v10-upgrade-guidance#updated-command-spo-file-copy
https://pnp.github.io/cli-microsoft365/v10-upgrade-guidance#removed-aad-options-and-aliasses-to-aad-commands

none of those were changed. So it seems we are go to go 🚀

[milanholemans]

All of the links you mentioned were changed, no?

[Adam-it]

All of the links you mentioned were changed, no?

Hmmm, yes I think your right 🤦‍♂️ I must have checked it on wrong branch locally.
Thanks for the double confirmation I will recheck and update the blog post

[Adam-it]

@milanholemans I prepared the PR with required changes in the release blog post pnp/blog#1966
You may give it a check if needed.
When merging this PR I will merge the update to the release blog post at same time

[Adam-it]

Merged manually. Awesome work 👏. You Rock 🤩