feat(doc): introduce global tolerations and nodeselectors for user deployed components

[ChanYiLin]

ref: https://github.com/longhorn/longhorn/issues/5089

• Add global tolerations and nodeselectors for user deployed components
• Use global setting by default
• Override each by their specific settings .

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[ChanYiLin]

@ChanYiLin I have completed the review. Can we specify where users can find the Edit as YAML button on the Rancher UI?

Hi @jillian-maroket It is quite hard to describe. It doesn't locate at some fixed place, it appears during the process of the installationa/upgrade, it is part of the step https://www.virtualizationhowto.com/2022/05/install-longhorn-rancher-for-kubernetes-block-storage/ You can check the process of the installation, it appears in the "Install: Step 2" which asks users to configure the helm value. I change the description to

• click **Edit as YAML** during the installation
• click **Edit as YAML** during the upgrade

[ChanYiLin]

Hi @jillian-maroket Fixed, thank you!