From a science point of view, yes, if life were discovered on Venus, there would be an immediate switch in priorities. Scientifically this would be huge. (And contrary to other answers, science rather than colonisation is the main reason for funding space missions in the current political climate.) It would be our first discovery of life anywhere away from Earth, so there would be a huge wave of media excitement and popular interest, and as a result, funding for space missions, especially Venus ones, would go up for a while.
Scientists all over the world would be intensely excited to answer all sorts of questions about Venus life: did it arise independently of Earth life, or was life transported from one planet to another via meteorite impacts, which is thought to be possible? Does Venus life use the same amino acids and nucleic acids as Earth life, or is its chemistry completely different? How does life survive in the incredibly harsh environment on Venus, and how many places on the planet can it live? There is basically nobody in biology or planetary sciences who wouldn't immediately want to know all that. Then there's all the potential medical applications of a whole other biosphere full of biologically active molecules that are probably not found on Earth. So basically it's a no-brainer: there's no doubt that if this was discovered there would be at least one follow-up mission, perhaps several, designed specifically to study it. This would indeed quite likely involve cuts in funding for Mars missions, because that's just the way things work.
These Venus missions would not be manned, due to Venus' thick corrosive atmosphere. This not only makes it extremely hard for even an unmanned spacecraft to last very long but also means that you can't blast off from Venus unless you manage to take something the size of a Saturn V with you and land it on the surface - that's currently quite some way beyond what humans are practically capable of. So these would be robotic missions with specifically designed experiments for studying Venusian biology. Perhaps people would consider a sample return mission - i.e. an unmanned spacecraft that picks up a sample and takes it back to Earth - though I would guess that would be unfeasible at our present stage of development.
However, there is a big caveat to be mentioned. Life is thought to be very unlikely on Venus, due to the extremely high temperature and sulfuric acid rain - certainly no known Earth life can survive there. We can suspend disbelief and imagine that life finds a way to survive there anyway, but it also poses another problem: no probe sent to Venus in 2022 will include equipment to detect life, because nobody expects to find it there. Detecting life in non-Earth-like soil is hard - even the recent Mars probes don't carry equipment designed to do that, because it would be prohibitively expensive to do so. So the probe will not carry PCR equipment for detecting DNA; it will not carry an experiment to culture any bacteria it might happen to find, and it will not carry the microscope and special dyes that would be needed to attempt to observe cells directly. Even if the soil on Venus were teeming with as many bacteria on Earth, it would look as lifeless as Earth dirt to the rover's sensors. If you're really lucky a growing bacterial colony might be observed by the cameras, but it would just look like a small stain that changes slowly in size, and it would be impossible to be sure that that was actually life rather than just a chemical phenomenon.
For these reasons, it's extremely unlikely that a near-future Venus rover would find life on Venus even if it were there - they only way I can think of it happening is if there is not just bacteria but actual complex multicellular life that can be directly and unmistakably observed by a camera.