roachtest: disable skip upgrades for http-register-routes

There is a known bug where the framework attempts to always enforce
at least one skip upgrade if enabled, even if the minimum bootstrap
version does not allow for it. This was fixed in #146857, but not
backported.

Author: DarrylWong

pkg/cmd/roachtest/tests/versionupgrade.go

@@ -326,6 +326,11 @@ func runHTTPRestart(ctx context.Context, t test.Test, c cluster.Cluster) {
 		// test is concerned about testing cluster startup. We don't want the
 		// framework to bootstrap the cluster before we can start running hooks.
 		mixedversion.MinimumBootstrapVersion("v24.2.0"),
+		// There is a known bug where the framework attempts to always enforce
+		// at least one skip upgrade if enabled, even if the minimum bootstrap
+		// version does not allow for it. This was fixed in #146857, but not
+		// backported.
+		mixedversion.DisableSkipVersionUpgrades,
 	)
 
 	// Any http request requiring auth will do.