### What?
Removes Collapsible label from child field label in the `FieldSelect`
component (for example Bulk Edit field select dropdown)
### Why?
Including the Collapsible field label in the option label of the
FieldSelect component could potentially be confusing to a user as it
eludes to the field being nested in the Data schema.
### How?
In the reduceFields function of the FieldsLabel component, if
`field.type === 'collpasible'` the collapsible field's label will not be
combined with the child fields labels.
Fixes#10757
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Co-authored-by: Patrik Kozak <patrik@payloadcms.com>