fix(recom): add missing directive for Vcocco

Add __coccos directive to ensure that
sinking works when coccus are excluded
…
if (any(recom_cocco_tracer_id == tracer_id(tr_num))) Vben = VCocco
…
Is used when __coccos is activated. Otherwise, missing flag cause compilation
error for the cases without coccos.

src/oce_ale_tracer.F90

@@ -1120,10 +1120,9 @@ subroutine ver_sinking_recom_benthos(tr_num,mesh)
         if (any(recom_det_tracer_id == tracer_id(tr_num))) Vben = Vdet
         if (any(recom_phy_tracer_id == tracer_id(tr_num))) Vben = VPhy
         if (any(recom_dia_tracer_id == tracer_id(tr_num))) Vben = VDia
+#if defined (__coccos)
         if (any(recom_cocco_tracer_id == tracer_id(tr_num))) Vben = VCocco   ! check conditions (#if defined (__coccos)) and add the necessary tracers numbers below OG:
 ! Adjust iphycalc
-
-#if defined (__coccos)
         if(tracer_id(tr_num)==1020) Vben = VCocco   !iphycal in case of coccos 
 #endif