server/public/ -- pre-requisite changes (#23278)

* invert depdendency: filestore -> model

* markdown: nolint:misspell

* inline jsonutils within model

* push model.GetInfoForBytes -> channels/app

* push channel/utils.CompileGo* -> plugin/utils

* push plugin/scheduler -> channels/jobs/plugins

* push utils.Copy(File|Dir) -> model

* oauthproiders/gitlab -> channels/app/oauthproviders/gitlab

* decouple plugin from einterfaces.MetricsInterface

* fix TestGetInfoForFile

* Revert "Run golangci in server CI (#23240)"

This reverts commit 349e5d4573.

* add model/utils

---------

Co-authored-by: Agniva De Sarker <agnivade@yahoo.co.in>

server/channels/app/file.go

@@ -66,7 +66,7 @@ func (a *App) FileBackend() filestore.FileBackend {
 }
 
 func (a *App) CheckMandatoryS3Fields(settings *model.FileSettings) *model.AppError {
-	fileBackendSettings := settings.ToFileBackendSettings(false, false)
+	fileBackendSettings := filestore.NewFileBackendSettingsFromConfig(settings, false, false)
 	err := fileBackendSettings.CheckMandatoryS3Fields()
 	if err != nil {
 		return model.NewAppError("CheckMandatoryS3Fields", "api.admin.test_s3.missing_s3_bucket", nil, "", http.StatusBadRequest).Wrap(err)
@@ -96,7 +96,7 @@ func (a *App) TestFileStoreConnection() *model.AppError {
 func (a *App) TestFileStoreConnectionWithConfig(cfg *model.FileSettings) *model.AppError {
 	license := a.Srv().License()
 	insecure := a.Config().ServiceSettings.EnableInsecureOutgoingConnections
-	backend, err := filestore.NewFileBackend(cfg.ToFileBackendSettings(license != nil && *license.Features.Compliance, insecure != nil && *insecure))
+	backend, err := filestore.NewFileBackend(filestore.NewFileBackendSettingsFromConfig(cfg, license != nil && *license.Features.Compliance, insecure != nil && *insecure))
 	if err != nil {
 		return model.NewAppError("FileBackend", "api.file.no_driver.app_error", nil, "", http.StatusInternalServerError).Wrap(err)
 	}
@@ -260,7 +260,7 @@ func (a *App) getInfoForFilename(post *model.Post, teamID, channelID, userID, ol
 		return nil
 	}
 
-	info, err := model.GetInfoForBytes(name, bytes.NewReader(data), len(data))
+	info, err := getInfoForBytes(name, bytes.NewReader(data), len(data))
 	if err != nil {
 		mlog.Warn(
 			"Unable to fully decode file info when migrating post to use FileInfos",
@@ -879,7 +879,7 @@ func (a *App) DoUploadFileExpectModification(c request.CTX, now time.Time, rawTe
 	channelID := filepath.Base(rawChannelId)
 	userID := filepath.Base(rawUserId)
 
-	info, err := model.GetInfoForBytes(filename, bytes.NewReader(data), len(data))
+	info, err := getInfoForBytes(filename, bytes.NewReader(data), len(data))
 	if err != nil {
 		err.StatusCode = http.StatusBadRequest
 		return nil, data, err