[MM-52926] Deprecating work templates (#23466)

Co-authored-by: Mattermost Build <build@mattermost.com>

server/Makefile

@@ -354,9 +354,6 @@ telemetry-mocks: ## Creates mock files.
 store-layers: ## Generate layers for the store
 	$(GO) generate $(GOFLAGS) ./channels/store
 
-generate-worktemplates: ## Generate work templates
-	$(GO) generate $(GOFLAGS) ./channels/app/worktemplates
-
 new-migration: ## Creates a new migration. Run with make new-migration name=<>
 	$(GO) install github.com/mattermost/morph/cmd/morph@master
 	@echo "Generating new migration for mysql"
@@ -395,7 +392,6 @@ sharedchannel-mocks: ## Creates mock files for shared channels.
 misc-mocks: ## Creates mocks for misc interfaces.
 	$(GO) install github.com/vektra/mockery/v2/...@v2.23.2
 	$(GOBIN)/mockery --dir channels/utils --name LicenseValidatorIface --output channels/utils/mocks --note 'Regenerate this file using `make misc-mocks`.'
-	$(GOBIN)/mockery --dir channels/app --name WorkTemplateExecutor --output channels/app/mocks --note 'Regenerate this file using `make misc-mocks`.'
 
 email-mocks: ## Creates mocks for misc interfaces.
 	$(GO) install github.com/vektra/mockery/v2/...@v2.23.2