Upgrade Go to 1.24.3 (#31220)

* Upgrade Go to 1.24.3

Updates the following files:
- server/.go-version: 1.23.9 → 1.24.3
- server/build/Dockerfile.buildenv: golang:1.23.9-bullseye → golang:1.24.3-bullseye
- server/go.mod: go 1.23.0 → go 1.24.3, toolchain go1.23.9 → go1.24.3
- server/public/go.mod: go 1.23.0 → go 1.24.3, toolchain go1.23.9 → go1.24.3

Also fixes non-constant format string errors introduced by Go 1.24.3's stricter format string checking:
- Added response() helper function in slashcommands/util.go for simple string responses
- Removed unused responsef() function from slashcommands/util.go
- Replaced responsef() with response() for translated strings that don't need formatting
- Fixed fmt.Errorf and fmt.Fprintf calls to use proper format verbs instead of string concatenation
- Updated marketplace buildURL to handle format strings conditionally

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Update generated mocks for Go 1.24.3

Regenerated mocks using mockery v2.53.4 to ensure compatibility with Go 1.24.3.
This addresses mock generation failures that occurred with the Go upgrade.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Update to bookworm and fix non-existent sha

Signed-off-by: Stavros Foteinopoulos <stafot@gmail.com>

* fix non-constant format string

---------

Signed-off-by: Stavros Foteinopoulos <stafot@gmail.com>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Stavros Foteinopoulos <stafot@gmail.com>

server/Makefile

@@ -317,15 +317,15 @@ i18n-check: ## Exit on empty translation strings and translation source strings
 	$(GOBIN)/mmgotool i18n check-empty-src --portal-dir=""
 
 store-mocks: ## Creates mock files.
-	$(GO) install github.com/vektra/mockery/v2/...@v2.42.2
+	$(GO) install github.com/vektra/mockery/v2/...@v2.53.4
 	$(GOBIN)/mockery --config channels/store/.mockery.yaml
 
 cache-mocks:
-	$(GO) install github.com/vektra/mockery/v2/...@v2.42.2
+	$(GO) install github.com/vektra/mockery/v2/...@v2.53.4
 	$(GOBIN)/mockery --config platform/services/cache/.mockery.yaml
 
 telemetry-mocks: ## Creates mock files.
-	$(GO) install github.com/vektra/mockery/v2/...@v2.42.2
+	$(GO) install github.com/vektra/mockery/v2/...@v2.53.4
 	$(GOBIN)/mockery --config platform/services/telemetry/.mockery.yaml
 
 store-layers: ## Generate layers for the store
@@ -340,39 +340,39 @@ new-migration: ## Creates a new migration. Run with make new-migration name=<>
 	$(GOBIN)/morph new script $(name) --driver postgres --dir channels/db/migrations --sequence
 
 filestore-mocks: ## Creates mock files.
-	$(GO) install github.com/vektra/mockery/v2/...@v2.42.2
+	$(GO) install github.com/vektra/mockery/v2/...@v2.53.4
 	$(GOBIN)/mockery --config platform/shared/filestore/.mockery.yaml
 
 ldap-mocks: ## Creates mock files for ldap.
-	$(GO) install github.com/vektra/mockery/v2/...@v2.42.2
+	$(GO) install github.com/vektra/mockery/v2/...@v2.53.4
 	$(GOBIN)/mockery --dir $(BUILD_ENTERPRISE_DIR)/ldap --all --inpackage --note 'Regenerate this file using `make ldap-mocks`.'
 
 plugin-mocks: ## Creates mock files for plugins.
-	$(GO) install github.com/vektra/mockery/v2/...@v2.42.2
+	$(GO) install github.com/vektra/mockery/v2/...@v2.53.4
 	$(GOBIN)/mockery --config public/plugin/.mockery.yaml
 
 einterfaces-mocks: ## Creates mock files for einterfaces.
-	$(GO) install github.com/vektra/mockery/v2/...@v2.42.2
+	$(GO) install github.com/vektra/mockery/v2/...@v2.53.4
 	$(GOBIN)/mockery --config einterfaces/.mockery.yaml
 
 searchengine-mocks: ## Creates mock files for searchengines.
-	$(GO) install github.com/vektra/mockery/v2/...@v2.42.2
+	$(GO) install github.com/vektra/mockery/v2/...@v2.53.4
 	$(GOBIN)/mockery --config platform/services/searchengine/.mockery.yaml
 
 sharedchannel-mocks: ## Creates mock files for shared channels.
-	$(GO) install github.com/vektra/mockery/v2/...@v2.42.2
+	$(GO) install github.com/vektra/mockery/v2/...@v2.53.4
 	$(GOBIN)/mockery --config platform/services/sharedchannel/.mockery.yaml
 
 misc-mocks: ## Creates mocks for misc interfaces.
-	$(GO) install github.com/vektra/mockery/v2/...@v2.42.2
+	$(GO) install github.com/vektra/mockery/v2/...@v2.53.4
 	$(GOBIN)/mockery --config channels/utils/.mockery.yaml
 
 email-mocks: ## Creates mocks for misc interfaces.
-	$(GO) install github.com/vektra/mockery/v2/...@v2.42.2
+	$(GO) install github.com/vektra/mockery/v2/...@v2.53.4
 	$(GOBIN)/mockery --config channels/app/email/.mockery.yaml
 
 platform-mocks: ## Creates mocks for platform interfaces.
-	$(GO) install github.com/vektra/mockery/v2/...@v2.42.2
+	$(GO) install github.com/vektra/mockery/v2/...@v2.53.4
 	$(GOBIN)/mockery --config channels/app/platform/.mockery.yaml
 
 mmctl-mocks: ## Creates mocks for mmctl