Use crypto/sha256 (#29386)

Go 1.21 improved the performance of `crypto/sha256`. It's now similar to
`minio/sha256-simd`, so we should just use the standard libs.

https://go.dev/doc/go1.21#crypto/sha256
https://go-review.googlesource.com/c/go/+/408795
https://github.com/multiformats/go-multihash/pull/173

models/auth/twofactor.go

@@ -6,6 +6,7 @@ package auth
 import (
 	"context"
 	"crypto/md5"
+	"crypto/sha256"
 	"crypto/subtle"
 	"encoding/base32"
 	"encoding/base64"
@@ -18,7 +19,6 @@ import (
 	"code.gitea.io/gitea/modules/timeutil"
 	"code.gitea.io/gitea/modules/util"
 
-	"github.com/minio/sha256-simd"
 	"github.com/pquerna/otp/totp"
 	"golang.org/x/crypto/pbkdf2"
 )

models/migrations/base/hash.go

@@ -4,9 +4,9 @@
 package base
 
 import (
+	"crypto/sha256"
 	"encoding/hex"
 
-	"github.com/minio/sha256-simd"
 	"golang.org/x/crypto/pbkdf2"
 )
 

models/migrations/v1_14/v166.go

@@ -4,9 +4,9 @@
 package v1_14 //nolint
 
 import (
+	"crypto/sha256"
 	"encoding/hex"
 
-	"github.com/minio/sha256-simd"
 	"golang.org/x/crypto/argon2"
 	"golang.org/x/crypto/bcrypt"
 	"golang.org/x/crypto/pbkdf2"