Add diagram for admission control phases which shows the new validatingadmissionpolicies (#43836)

* Add diagram for admission control phases which shows the new validatingadmissionpolicies

* Change to a mermaid diagram

* Add accessibility description

* Fix font size issue

* Correct blue colour

* Move diagram type to top to see if it builds correctly

* Convert to exported svg and mermaid-live link

* correct image path

* Update filepath

* Update link to mermaid doc

With the annotation changes

* Delete content/en/docs/images/admission-control-phases.svg

* correct image path

* Correct parallelism of stages and state parallel stage explicitly

* Undo autolint

* Undo further autolint

* Remove bad merge

* Revert yet more IDE autoformatting

* Revert more IDE nonsense

* Remove yet more ide nonsense

* Remove the last of the IDE autoformatting

* Fix last piece of the bad merge

Author: RichardoC