I haven't been able to find anything that specifically says they don't need your Analytical score. Are you sure you hadn't heard that just many schools don't factor it heavily into their consideration, because I think that's true for the most part, but I've never heard of anyone skipping it and not submitting a score at all ( I didn't even think you could skip it, but I took the old, computer test, so maybe you couldn't at the time). The AAVMC page of UC Davis does say Quant scores for GRE evaluation, and Florida mentions looking at Verbal and Quant, but no one explicitly states that they don't ever look at the Analytical portion . I also checked the AAVMC descriptor page/websites for this info.
As for whether or not schools will find out, I don't think VMCAS will tell them, but they might ask where else you applied/interviewed during your own interviews, so it could come up there. Only advice I have is really to keep your head up and see how the year goes and maybe retake the GRE if any schools have a later GRE deadline for receiving scores.