feat(config): Add fields for controller rate limit configuration

internal/cmd/config/testdata/TestLoad/MultiFileDuplicateStanza/00-controller.hcl

@@ -10,6 +10,14 @@ controller {
   database {
     url = "env://LOAD_TEST_BOUNDARY_POSTGRES_URL"
   }
+
+  api_rate_limit {
+    resources = ["*"]
+    actions   = ["*"]
+    per       = "total"
+    limit     = 50
+    period    = "1m"
+  }
 }
 
 listener "tcp" {

internal/cmd/config/testdata/TestLoad/MultiFileDuplicateStanza/01-controller-duplicated.hcl

@@ -8,4 +8,12 @@ controller {
   database {
     url = "env://LOAD_TEST_BOUNDARY_POSTGRES_URL"
   }
+
+  api_rate_limit {
+    resources = ["*"]
+    actions   = ["list"]
+    per       = "total"
+    limit     = 20
+    period    = "1m"
+  }
 }