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/public/model/client4.go

@@ -631,7 +631,7 @@ func (c *Client4) accessControlPoliciesRoute() string {
 }
 
 func (c *Client4) celRoute() string {
-	return fmt.Sprintf(c.accessControlPoliciesRoute() + "/cel")
+	return c.accessControlPoliciesRoute() + "/cel"
 }
 
 func (c *Client4) accessControlPolicyRoute(policyID string) string {
@@ -2938,7 +2938,6 @@ func (c *Client4) InviteGuestsToTeam(ctx context.Context, teamId string, userEma
 // InviteUsersToTeam invite users by email to the team.
 func (c *Client4) InviteUsersToTeamGracefully(ctx context.Context, teamId string, userEmails []string) ([]*EmailInviteWithError, *Response, error) {
 	r, err := c.DoAPIPost(ctx, c.teamRoute(teamId)+"/invite/email?graceful="+c.boolString(true), ArrayToJSON(userEmails))
-
 	if err != nil {
 		return nil, BuildResponse(r), err
 	}
@@ -9354,7 +9353,6 @@ func (c *Client4) AddUserToGroupSyncables(ctx context.Context, userID string) (*
 
 func (c *Client4) CheckCWSConnection(ctx context.Context, userId string) (*Response, error) {
 	r, err := c.DoAPIGet(ctx, c.cloudRoute()+"/healthz", "")
-
 	if err != nil {
 		return BuildResponse(r), err
 	}