Replace go-migrate with morph (#19116)

vendor/github.com/go-morph/morph/go.mod

@@ -0,0 +1,14 @@
+module github.com/go-morph/morph
+
+go 1.15
+
+require (
+	github.com/dave/jennifer v1.4.1
+	github.com/fatih/color v1.10.0
+	github.com/go-sql-driver/mysql v1.6.0
+	github.com/lib/pq v1.10.0
+	github.com/pkg/errors v0.9.1
+	github.com/spf13/cobra v1.1.3
+	github.com/stretchr/testify v1.3.0
+	golang.org/x/sys v0.0.0-20210326220804-49726bf1d181 // indirect
+)