The question whether ringing a bell on a tower can influence lightning strikes involves two aspects: hypothesizing physical processes which might be relevant, and then figuring out (or measuring) whether they are. Here are two physical processes I can think of: the sound waves in the air, and the bell itself with the clapper hitting it.

Sound waves could conceivably influence electrical conductivity of damp air, but I doubt whether this effect is large enough to have a non-negligible influence on the charge and field build-up which leads to a lightning strike.

The final image in the question shows a lightning rod (also called lightning conductor) not a bell. Such rods were introduced in the 1750s (says Wiki). They work via two effects: a gradual one and a sudden one. The electric field near a charged conductor has a much larger value near a sharp point. So by using a pointed conductor one encourages modest currents in the air near the tip of the lightning rod which, gradually, tend to reduce the charge build-up in the cloud and thus reduce the overall frequency and strength of lightning strikes. This is not enough to entirely suppress strikes but overall it does help. These currents also have the effect of making the lightning more likely to strike the rod than other nearby things. This offers protection to the building as long as the long thick copper wire from ground to rod can itself conduct most of the current without melting.

Coming now to the ringing bell, if the clapper is metal then as it strikes the bell there might conceivably be an increase in the electrical emission from the bell (in the presence of the kind of charge build-up which occurs in thunderstorms). Thus it begins to play the first part of the role of a lightning rod. However I guess this effect is pretty small, and of course without the rest of the rod the bell offers no protection against an actual strike. As another answer has already pointed out, if such effects were non-negligible then one would think it would have been noticed and investigated by now, and bells would be recommended as a solution for some buildings. But last time I looked pretty much all church towers have lightning rods.

The question whether ringing a bell on a tower can influence lightning strikes involves two aspects: hypothesizing physical processes which might be relevant, and then figuring out (or measuring) whether they are. Here are two physical processes I can think of: the sound waves in the air, and the bell itself with the clapper hitting it.

Sound waves could conceivably influence electrical conductivity of damp air, but I doubt whether this effect is large enough to have a non-negligible influence on the charge and field build-up which leads to a lightning strike.

The final image in the question shows a lightning rod (also called lightning conductor) not a bell. Such rods were introduced in the 1750s (says Wiki). They work via two effects: a gradual one and a sudden one. The electric field near a charged conductor has a much larger value near a sharp point. So by using a pointed conductor one encourages modest currents in the air near the tip of the lightning rod which, gradually, tend to reduce the charge build-up in the cloud and thus reduce the overall frequency and strength of lightning strikes. This is not enough to entirely suppress strikes but overall it does help. These currents also have the effect of making the lightning more likely to strike the rod than other nearby things. This offers protection to the building as long as the long thick copper wire from ground to rod can itself conduct most of the current without melting.

Coming now to the ringing bell, if the clapper is metal then as it strikes the bell there might conceivably be an increase in the electrical emission from the bell (in the presence of the kind of charge build-up which occurs in thunderstorms). Thus it begins to play the first part of the role of a lightning rod. However I guess this effect is pretty small, and of course without the rest of the rod the bell offers no protection against an actual strike. As another answer has already pointed out, if such effects were non-negligible then one would think it would have been noticed and investigated by now, and bells would be recommended as a solution for some buildings. But last time I looked pretty much all church towers have lightning rods.

Finally, concerning cloud formation: this also is a big issue in many parts of the world so one would think that if bells could help then it would have been noticed and documented more fully and convincingly by now. Disturbing air which is already supersaturated will in general encourage (not discourage) droplets to form. However there have been many efforts to do this by seeding the air and it appears that it is hard to do on a large enough scale to have any useful impact.