Add new clang-format option to remove redundant parentheses

The new clang-format option (since 17) can remove redundant parentheses
in the return statement (with configuration value ReturnStatement).

(cherry picked from commit 3873b0c279)

.clang-format

@@ -79,3 +79,4 @@ PenaltyExcessCharacter: 100
 Standard: Cpp11
 ContinuationIndentWidth: 8
 ForEachMacros: [ 'cds_lfs_for_each', 'cds_lfs_for_each_safe', 'cds_list_for_each_entry_safe', 'ISC_LIST_FOREACH', 'ISC_LIST_FOREACH_SAFE', 'ISC_LIST_FOREACH_REV', 'ISC_LIST_FOREACH_REV_SAFE' ]
+RemoveParentheses: ReturnStatement

.clang-format.headers

@@ -78,3 +78,4 @@ PenaltyBreakString: 80
 PenaltyExcessCharacter: 100
 Standard: Cpp11
 ContinuationIndentWidth: 8
+RemoveParentheses: ReturnStatement