Allow users to turn off intrinsic function suggestions

[liamdawson]

Whenever I press ctrl-space to see properties I can set for a resource, this is what I see:

This means I must always scroll to see any relevant properties for a resource after pressing ctrl-space.

I can hide these suggestions by turning off editor.suggest.showValues for YAML files, but this means that I also lose suggestions for the values of properties. For example, UpdateReplacePolicy then no longer suggests Delete/Retain/Snapshot. Instead, I would like to turn off suggestions for intrinsic functions alone.

For reference, this is what I would like to see when I press ctrl-space in this context:

(I achieved that by manually commenting out the customTags in the extension on disk, which is only a temporary solution, and probably has other side effects)

[liamdawson]

Additionally, I continue to see suggestions after turning off the following settings:

• cfnLint.completion
• cfnLint.enableAutocomplete

[kddejong]

PR will fix the issue with the not being able to disable completion and clean up the settings to the ones that matter.

The other issue that will take a little more effort is to figure out the right spots to provide intrinsic function completion.