Add new [lfs_client].BATCH_SIZE and [server].LFS_MAX_BATCH_SIZE config settings. (#32307)

This contains two backwards-compatible changes:
* in the lfs http_client, the number of lfs oids requested per batch is
loaded from lfs_client#BATCH_SIZE and defaulted to the previous value of
20
* in the lfs server/service, the max number of lfs oids allowed in a
batch api request is loaded from server#LFS_MAX_BATCH_SIZE and defaults
to 'nil' which equates to the previous behavior of 'infinite'

This fixes #32306

---------

Signed-off-by: Royce Remer <royceremer@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

modules/setting/lfs_test.go

@@ -99,3 +99,19 @@ STORAGE_TYPE = minio
 	assert.EqualValues(t, "gitea", LFS.Storage.MinioConfig.Bucket)
 	assert.EqualValues(t, "lfs/", LFS.Storage.MinioConfig.BasePath)
 }
+
+func Test_LFSClientServerConfigs(t *testing.T) {
+	iniStr := `
+[server]
+LFS_MAX_BATCH_SIZE = 100
+[lfs_client]
+# will default to 20
+BATCH_SIZE = 0
+`
+	cfg, err := NewConfigProviderFromData(iniStr)
+	assert.NoError(t, err)
+
+	assert.NoError(t, loadLFSFrom(cfg))
+	assert.EqualValues(t, 100, LFS.MaxBatchSize)
+	assert.EqualValues(t, 20, LFSClient.BatchSize)
+}