Fix: replace hard coding with variables

What does this MR do and why?

related to #385178 (closed)

This mr is used to fix display issue when change group deletion protection

/cc @JeremyWuuuuu @prajnamas @orozot @qk44077907

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. goto any group setting
2. general setting - Permissions and group features
3. Deletion protection options
4. observe Keep deleted projects for 7 days option

MR acceptance checklist

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