Same seal migration oss (#10224)

* Refactoring and test improvements.

* Support migrating from a given type of autoseal to that same type but with different parameters.

command/server.go

@@ -1100,7 +1100,9 @@ func (c *ServerCommand) Run(args []string) int {
 					Logger: c.logger.Named("shamir"),
 				}),
 			})
-			wrapper, sealConfigError = configutil.ConfigureWrapper(configSeal, &infoKeys, &info, sealLogger)
+			var sealInfoKeys []string
+			var sealInfoMap = map[string]string{}
+			wrapper, sealConfigError = configutil.ConfigureWrapper(configSeal, &sealInfoKeys, &sealInfoMap, sealLogger)
 			if sealConfigError != nil {
 				if !errwrap.ContainsType(sealConfigError, new(logical.KeyNotFoundError)) {
 					c.UI.Error(fmt.Sprintf(
@@ -1116,12 +1118,18 @@ func (c *ServerCommand) Run(args []string) int {
 				})
 			}
 
+			var infoPrefix = ""
 			if configSeal.Disabled {
 				unwrapSeal = seal
+				infoPrefix = "Old "
 			} else {
 				barrierSeal = seal
 				barrierWrapper = wrapper
 			}
+			for _, k := range sealInfoKeys {
+				infoKeys = append(infoKeys, infoPrefix+k)
+				info[infoPrefix+k] = sealInfoMap[k]
+			}
 
 			// Ensure that the seal finalizer is called, even if using verify-only
 			defer func() {
@@ -1570,7 +1578,7 @@ CLUSTER_SYNTHESIS_COMPLETE:
 	// Vault cluster with multiple servers is configured with auto-unseal but is
 	// uninitialized. Once one server initializes the storage backend, this
 	// goroutine will pick up the unseal keys and unseal this instance.
-	if !core.IsInSealMigration() {
+	if !core.IsInSealMigrationMode() {
 		go func() {
 			for {
 				err := core.UnsealWithStoredKeys(context.Background())