internal/stub: move from container

This package solves a very specific stubbing use case, in a less than elegant manner.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/store/data_test.go

@@ -11,8 +11,8 @@ import (
 	"testing"
 	"time"
 
-	"hakurei.app/container/stub"
 	"hakurei.app/hst"
+	"hakurei.app/internal/stub"
 )
 
 func TestEntryData(t *testing.T) {

internal/store/segment_test.go

@@ -13,9 +13,9 @@ import (
 	_ "unsafe" // for go:linkname
 
 	"hakurei.app/check"
-	"hakurei.app/container/stub"
 	"hakurei.app/hst"
 	"hakurei.app/internal/store"
+	"hakurei.app/internal/stub"
 )
 
 // Made available here for direct validation of state entry files.