Add deprecation labels to configs (#1969)

Add deprecation labels according to the test results

Author: NataliaIvakina

modules/ROOT/pages/configuration/configuration-settings.adoc

@@ -2959,6 +2959,7 @@ m|
 |===
 
 
+[role=label--deprecated-5.26]
 [[config_server.memory.off_heap.block_cache_size]]
 === `server.memory.off_heap.block_cache_size`
 
@@ -2974,6 +2975,7 @@ m|+++128+++
 |===
 
 
+[role=label--deprecated-5.26]
 [[config_server.memory.off_heap.max_cacheable_block_size]]
 === `server.memory.off_heap.max_cacheable_block_size`