test: update nextest profile
ref tikv/tikv#12769
[profile.ci]
-retries = 1 # Run at most 2 times
+retries = 2 # Run at most 3 times
fail-fast = false
-slow-timeout = { period = "60s", terminate-after = 2 } # Timeout=120s
+slow-timeout = { period = "60s", terminate-after = 2 } # Timeout 2m
+failure-output = "final"
[profile.ci.junit]
path = "junit.xml"
