backupccl: add env variable to disable version checking

This change adds an env variable that will be set by the
job running restore roachtests until we have updated all their
fixtures to be 22.2.0+.

Release note: None

pkg/ccl/backupccl/BUILD.bazel

@@ -126,6 +126,7 @@ go_library(
         "//pkg/util/bulk",
         "//pkg/util/contextutil",
         "//pkg/util/ctxgroup",
+        "//pkg/util/envutil",
         "//pkg/util/hlc",
         "//pkg/util/interval",
         "//pkg/util/json",

pkg/ccl/backupccl/restore_planning.go

@@ -62,6 +62,7 @@ import (
 	"github.com/cockroachdb/cockroach/pkg/sql/sqlerrors"
 	"github.com/cockroachdb/cockroach/pkg/sql/sqlutil"
 	"github.com/cockroachdb/cockroach/pkg/sql/syntheticprivilege"
+	"github.com/cockroachdb/cockroach/pkg/util/envutil"
 	"github.com/cockroachdb/cockroach/pkg/util/hlc"
 	"github.com/cockroachdb/cockroach/pkg/util/log"
 	"github.com/cockroachdb/cockroach/pkg/util/tracing"
@@ -1510,7 +1511,14 @@ func doRestorePlan(
 	// version into a cluster that is on the same version or the next major
 	// version.
 	minimumRestorableVersion := p.ExecCfg().Settings.Version.BinaryMinSupportedVersion()
-	if !build.IsRelease() {
+	if !envutil.EnvOrDefaultBool("COCKROACH_ENFORCE_MIN_RESTOREABLE_VERSION", true) {
+		// Set the minimumRestoreableVersion to a version that will be less than any
+		// backup version rendering the check a no-op.
+		//
+		// TODO(adityamaru): Delete this block once all the restore roachtest
+		// fixtures have been updated to be 22.2.0+.
+		minimumRestorableVersion = roachpb.Version{Major: 1}
+	} else if !build.IsRelease() {
 		minimumRestorableVersion, err = minimumRestorableVersion.VersionWithoutDevOffset()
 		if err != nil {
 			return err