fix: upgrades: do not hardcode versions

- upgrading v7.0 to v7.0 is a noop
- pprof testing lags behind

upgrade/upgrade.sh

@@ -30,7 +30,9 @@ function test_successful_upgrades() {
         log_info "using $config"
         upgrade_reset $config
 
-        version=7.0
+        set $RELEASE_NUMBERS
+        version="$1"
+        shift
         log_info "run $version"
         cleanup_storage
         start $version
@@ -38,7 +40,7 @@ function test_successful_upgrades() {
         fixture_assert
         doctor_run $config
 
-        for version in $RELEASE_NUMBERS; do
+        for version in $@; do
             stop
             log_info "run $version"
             start $version