chore(*): update `injective` lemma names to match the naming guide (#6740)
In `src/algebra/group_ring_action.lean`:
- `injective_to_semiring_hom` -> `to_semiring_hom_injective`
In `src/algebra/module/linear_map.lean`:
- `linear_equiv.injective_to_equiv` -> `linear_equiv.to_equiv_injective`
- `linear_equiv.injective_to_linear_map` -> `linear_equiv.to_linear_map_injective`
In `src/analysis/normed_space/enorm.lean`:
- `enorm.injective_coe_fn` -> `enorm.coe_fn_injective`
In `src/data/equiv/basic.lean`:
- `equiv.injective_coe_fn` -> `equiv.coe_fn_injective`
In `src/data/real/nnreal.lean`:
- `nnreal.injective_coe` -> `nnreal.coe_injective`
In `src/data/sum.lean`:
- `sum.injective_inl` -> `sum.inl_injective`
- `sum.injective_inr` -> `sum.inr_injective`
In `src/linear_algebra/affine_space/affine_equiv.lean`:
- `affine_equiv.injective_to_affine_map` -> `affine_equiv.to_affine_map_injective`
- `affine_equiv.injective_coe_fn` -> `affine_equiv.coe_fn_injective`
- `affine_equiv.injective_to_equiv` -> `affine_equiv.to_equiv_injective`
In `src/linear_algebra/affine_space/affine_map.lean`:
- `affine_map.injective_coe_fn` -> `affine_map.coe_fn_injective`
In `src/measure_theory/outer_measure.lean`:
- `measure_theory.outer_measure.injective_coe_fn` -> `measure_theory.outer_measure.coe_fn_injective`
In `src/order/rel_iso.lean`:
- `rel_iso.injective_to_equiv` -> `rel_iso.to_equiv_injective`
- `rel_iso.injective_coe_fn` -> `rel_iso.coe_fn_injective`
In `src/topology/algebra/module.lean`:
- `continuous_linear_map.injective_coe_fn` -> `continuous_linear_map.coe_fn_injective`