outdent with shift-tab can make some blocks reduce their indent while others don't

[GermanJablo]

Describe the Bug

If there are two blocks selected (ex: 2 paragraphs), and one has indent 1 and the other has indent 0, pressing shift+tab causes both to end with indent 0.
The outdent command should check that all selected blocks can receive outdent.
I just fixed that for the toolbar case: #11089

Link to the code that reproduces this issue

https://github.com/payloadcms/payload

Reproduction Steps

• pnpm dev fields
• In the lexical fields collection, select a paragraph with indent 1 and another with indent 0 and press shift + tab

Which area(s) are affected? (Select all that apply)

plugin: richtext-lexical

Environment Info

Payload: 3.22.0