How does one turn off grey suggestions in Visual Studio 2022, but keep the table below?

You can disable that "IntelliCode Code Completions" feature in Visual Studio 2022 by going to Tools ==> Options ==> Preview Features and uncheck Enable all IntelliCode preview features
See: Visual Studio IntelliCode Whole line completions
See also: https://visualstudio.microsoft.com/services/intellicode/
Note: We have several Preview features which are off by default and can be enabled through the Tools > Options > IntelliCode page.
Depending on used version of VS 2022 (mine is 17.0.1, not preview), you can go to Tools->Options->IntelliCode and disable Show completions for whole lines of code option

Another option can be found in Controlling Whole line completions docs

Just use small button near Zoom drop-down in the left bottom corner of main editor