refactor : optimise select entry creation

src/app/formulaire/elements/select/select-field-charttype.ts

...rmulaire/elements/select/select-field-device-loi-debit.ts

...ire/elements/select/select-field-device-structure-type.ts

...rmulaire/elements/select/select-field-downstream-basin.ts

src/app/formulaire/elements/select/select-field-nub-prop.ts

.../formulaire/elements/select/select-field-remous-target.ts

...formulaire/elements/select/select-field-searched-param.ts

...re/elements/select/select-field-solver-targeted-result.ts

...formulaire/elements/select/select-field-solveur-target.ts

...p/formulaire/elements/select/select-field-species-list.ts

...pp/formulaire/elements/select/select-field-target-pass.ts

...formulaire/elements/select/select-field-upstream-basin.ts

src/app/formulaire/elements/select/select-field.ts