roachtest: use updated update_tenant_resource_limits signature in 24.3+

The function signature of update_tenant_resource_limits was changed
in v24.2.1 to deprecate the args "as_of" and "as_of_consumed_tokens".
Since serverless currently only uses the `tenant_id` overload and
not the `tenant_name` overload like we do in mixedversion, the args
were removed completely from the latter.

This breaks backwards compatibility so this change selectively omits
the removed args if the version is 24.2.1+.

pkg/cmd/roachtest/roachtestutil/mixedversion/mixedversion.go

@@ -210,6 +210,11 @@ var (
 	// would *not* make the tenant auto upgrade.
 	tenantSupportsAutoUpgradeVersion = clusterupgrade.MustParseVersion("v24.2.0-alpha.00000000")
 
+	// updateTenantResourceLimitsDeprecatedArgsVersion is the lowest version
+	// after which the "as_of" and "as_of_consumed_tokens" arguments were removed when
+	// using the `tenant_name` overload.
+	updateTenantResourceLimitsDeprecatedArgsVersion = clusterupgrade.MustParseVersion("v24.2.1")
+
 	// Catch divergences between `stepFunc` and `Run`'s signature in
 	// `singleStepProtocol` at compile time.
 	_ = func() stepFunc {

pkg/cmd/roachtest/roachtestutil/mixedversion/steps.go

@@ -590,10 +590,17 @@ func (s disableRateLimitersStep) Run(
 	// to outright disable the tenant rate limiter. Instead, we instead set the tenant's
 	// resource limits to an arbitrarily high value.
 	stmt = fmt.Sprintf(
-		"SELECT crdb_internal.update_tenant_resource_limits('%s', %v, %v, %d, now(), 0);",
+		"SELECT crdb_internal.update_tenant_resourcet_limits('%s', %v, %v, %d, now(), 0);",
 		s.virtualClusterName, availableTokens, refillRate, maxBurstTokens,
 	)
 
+	if h.System.FromVersion.AtLeast(updateTenantResourceLimitsDeprecatedArgsVersion) {
+		stmt = fmt.Sprintf(
+			"SELECT crdb_internal.update_tenant_resource_limits('%s', %v, %v, %d);",
+			s.virtualClusterName, availableTokens, refillRate, maxBurstTokens,
+		)
+	}
+
 	return h.System.Exec(rng, stmt)
 }