Align field values with fixed width for field key. (#5821)

Made the alignment consistent with the field panel. This uses 90px as
the key label width.

**Issue:** #5730 

**Changes:**
- Add a label width of 90 to FieldContext Provider in useFieldContext
function
- Add a label width of 90 to ActivityTargetsInlineCell component

**Screen recording form local testing:**



https://github.com/twentyhq/twenty/assets/120792086/e150530b-4163-4a69-9bd5-119a2f202d4f

---------

Co-authored-by: Thomas Trompette <thomas.trompette@sfr.fr>

packages/twenty-front/src/modules/object-record/hooks/useFieldContext.tsx

@@ -72,6 +72,7 @@ export const useFieldContext = ({
                 showLabel: true,
                 position: fieldPosition,
                 objectMetadataItem,
+                labelWidth: 90,
               }),
               useUpdateRecord:
                 customUseUpdateOneObjectHook ?? useUpdateOneObjectMutation,