ci: Enable SA5008 linting and fix discovered error. (#26633)

.golangci.yml

@@ -6,7 +6,7 @@ run:
   timeout: 10m
 
   # Modules download mode (do not modify go.mod)
-  module-download-mode: readonly
+  modules-download-mode: readonly
 
   # Exclude test files
   tests: false
@@ -52,6 +52,7 @@ linters:
         - shadow
     staticcheck:
       checks:
+        - SA5008
         - ST1016
         - ST1020
   exclusions:

testutil/server.go

@@ -104,7 +104,7 @@ type VaultConfig struct {
 	Enabled              bool                    `json:"enabled"`
 	Address              string                  `json:"address"`
 	AllowUnauthenticated *bool                   `json:"allow_unauthenticated,omitempty"`
-	Token                string                  `json:"token,omitemtpy"`
+	Token                string                  `json:"token,omitempty"`
 	Role                 string                  `json:"role,omitempty"`
 	JWTAuthBackendPath   string                  `json:"jwt_auth_backend_path,omitempty"`
 	DefaultIdentity      *WorkloadIdentityConfig `json:"default_identity,omitempty"`