📖 Add more documentation about the KCP pre-terminate hook

[sbueringer]

Signed-off-by: Stefan Büringer buringerst@vmware.com

What this PR does / why we need it:
Follow-up to #11137

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

[sbueringer]

/assign @fabriziopandini @chrischdi

[fabriziopandini]

Thanks for documenting this!
only one nit

[neolit123]

/lgtm

[fabriziopandini]

/cherry-pick release-1.8

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: d0896bc80426d9cabe3b8deddc4a73040eb0b737

[k8s-infra-cherrypick-robot]

@fabriziopandini: once the present PR merges, I will cherry-pick it on top of release-1.8 in a new PR and assign it to you.

In response to this:

/cherry-pick release-1.8

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[sbueringer]

Fixed, automated cherry-pick won't work. v1.8-v1.9 doc doesn't exist there

[neolit123]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 7c3d505cbf0d6c7c6707b965fa4a73bfcc1f0af7

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: neolit123

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[k8s-infra-cherrypick-robot]

@fabriziopandini: #11153 failed to apply on top of branch "release-1.8":

Applying: Add more documentation about the KCP pre-terminate hook
Using index info to reconstruct a base tree...
A	docs/book/src/developer/providers/migrations/v1.8-to-v1.9.md
Falling back to patching base and 3-way merge...
CONFLICT (modify/delete): docs/book/src/developer/providers/migrations/v1.8-to-v1.9.md deleted in HEAD and modified in Add more documentation about the KCP pre-terminate hook. Version Add more documentation about the KCP pre-terminate hook of docs/book/src/developer/providers/migrations/v1.8-to-v1.9.md left in tree.
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 Add more documentation about the KCP pre-terminate hook
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-1.8

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.