test(cloudflare_ruleset): add coverage for more actions

* Add `decode_null_to_zero` tag to `categories` and `rules` action
  parameters for the `execute` action to handle empty lists being
  omitted from API responses.

* Add `decode_null_to_zero` tag to `preserve_duplicates` action
  parameters for the `log_custom_field` action to handle `false` being
  omitted from API responses.

* Add validation to ensure `log_custom_field` action parameters are not
  set to empty lists.

* Ensure test data is formatted consistently and put actions in
  alphabetical order.

* Add test coverage for the `challenge`, `js_challenge`,
  `managed_challenge`, `execute`, `log`, and `log_custom_field` actions.

Author: zakcutner

internal/services/ruleset/model.go

@@ -118,9 +118,9 @@ type RulesetRulesActionParametersMatchedDataModel struct {
 
 type RulesetRulesActionParametersOverridesModel struct {
 	Action           types.String                                                                       `tfsdk:"action" json:"action,optional"`
-	Categories       customfield.NestedObjectList[RulesetRulesActionParametersOverridesCategoriesModel] `tfsdk:"categories" json:"categories,optional"`
+	Categories       customfield.NestedObjectList[RulesetRulesActionParametersOverridesCategoriesModel] `tfsdk:"categories" json:"categories,computed_optional,decode_null_to_zero"`
 	Enabled          types.Bool                                                                         `tfsdk:"enabled" json:"enabled,optional"`
-	Rules            customfield.NestedObjectList[RulesetRulesActionParametersOverridesRulesModel]      `tfsdk:"rules" json:"rules,optional"`
+	Rules            customfield.NestedObjectList[RulesetRulesActionParametersOverridesRulesModel]      `tfsdk:"rules" json:"rules,computed_optional,decode_null_to_zero"`
 	SensitivityLevel types.String                                                                       `tfsdk:"sensitivity_level" json:"sensitivity_level,optional"`
 }
 
@@ -280,7 +280,7 @@ type RulesetRulesActionParametersCookieFieldsModel struct {
 
 type RulesetRulesActionParametersRawResponseFieldsModel struct {
 	Name               types.String `tfsdk:"name" json:"name,required"`
-	PreserveDuplicates types.Bool   `tfsdk:"preserve_duplicates" json:"preserve_duplicates,optional"`
+	PreserveDuplicates types.Bool   `tfsdk:"preserve_duplicates" json:"preserve_duplicates,computed_optional,decode_null_to_zero"`
 }
 
 type RulesetRulesActionParametersRequestFieldsModel struct {
@@ -289,7 +289,7 @@ type RulesetRulesActionParametersRequestFieldsModel struct {
 
 type RulesetRulesActionParametersResponseFieldsModel struct {
 	Name               types.String `tfsdk:"name" json:"name,required"`
-	PreserveDuplicates types.Bool   `tfsdk:"preserve_duplicates" json:"preserve_duplicates,optional"`
+	PreserveDuplicates types.Bool   `tfsdk:"preserve_duplicates" json:"preserve_duplicates,computed_optional,decode_null_to_zero"`
 }
 
 type RulesetRulesActionParametersTransformedRequestFieldsModel struct {