Bump up restic version to 0.15.0

Signed-off-by: Ming <mqiu@vmware.com>

hack/build-restic.sh

@@ -50,7 +50,6 @@ fi
 mkdir ${build_path}/restic
 git clone -b v${RESTIC_VERSION} https://github.com/restic/restic.git ${build_path}/restic
 pushd ${build_path}/restic
-git apply /go/src/github.com/vmware-tanzu/velero/hack/modify_acces_denied_code.txt
 go run build.go --goos "${GOOS}" --goarch "${GOARCH}" --goarm "${GOARM}" -o ${restic_bin}
 chmod +x ${restic_bin}
 popd

hack/modify_acces_denied_code.txt

@@ -1,13 +0,0 @@
-diff --git a/internal/backend/s3/s3.go b/internal/backend/s3/s3.go
-index 0b3816c06..eec10f9c7 100644
---- a/internal/backend/s3/s3.go
-+++ b/internal/backend/s3/s3.go
-@@ -164,7 +164,7 @@ func isAccessDenied(err error) bool {
- 	debug.Log("isAccessDenied(%T, %#v)", err, err)
- 
- 	var e minio.ErrorResponse
--	return errors.As(err, &e) && e.Code == "Access Denied"
-+	return errors.As(err, &e) && e.Code == "AccessDenied"
- }
- 
- // IsNotExist returns true if the error is caused by a not existing file.