benchmarks: disable the flaky test_log_file BenchmarkDriver test
benchmarks: disable the flaky test_log_file BenchmarkDriver test

I'm not sure if it makes sense to keep this test around at all.
For now I just disabled it.

rdar://79701124

benlangmuir/swift,benlangmuir/swift,ahoppen/swift,apple/swift,parkera/swift,apple/swift,parkera/swift,apple/swift,xwu/swift,ahoppen/swift,xwu/swift,rudkx/swift,ahoppen/swift,roambotics/swift,gregomni/swift,roambotics/swift,xwu/swift,rudkx/swift,ahoppen/swift,parkera/swift,atrick/swift,ahoppen/swift,rudkx/swift,xwu/swift,parkera/swift,tkremenek/swift,tkremenek/swift,tkremenek/swift,JGiola/swift,benlangmuir/swift,rudkx/swift,hooman/swift,benlangmuir/swift,glessard/swift,hooman/swift,atrick/swift,gregomni/swift,benlangmuir/swift,parkera/swift,tkremenek/swift,glessard/swift,JGiola/swift,rudkx/swift,atrick/swift,hooman/swift,ahoppen/swift,gregomni/swift,hooman/swift,gregomni/swift,apple/swift,hooman/swift,xwu/swift,tkremenek/swift,parkera/swift,JGiola/swift,atrick/swift,apple/swift,tkremenek/swift,gregomni/swift,glessard/swift,apple/swift,xwu/swift,tkremenek/swift,glessard/swift,hooman/swift,xwu/swift,roambotics/swift,roambotics/swift,JGiola/swift,JGiola/swift,rudkx/swift,parkera/swift,atrick/swift,gregomni/swift,atrick/swift,JGiola/swift,benlangmuir/swift,parkera/swift,hooman/swift,glessard/swift,glessard/swift,roambotics/swift,roambotics/swift