boost/bloom_filter_test: wait for total memory reclaimed update

The testcase `test_bloom_filter_reclaim_during_reload` checks the
SSTable manager's `_total_memory_reclaimed` against an expected value to
verify that a Bloom filter was reloaded. However, it does not wait for
the manager to update the variable, causing the check to fail if the
update has not occurred yet. Fix it by making the testcase wait until
the variable is updated to the expected value.

Fixes scylladb#19879

Signed-off-by: Lakshmi Narayanan Sreethar <[email protected]>

Closes scylladb#19883

test/boost/bloom_filter_test.cc

@@ -176,8 +176,8 @@ SEASTAR_TEST_CASE(test_bloom_filter_reclaim_during_reload) {
         // resume reloading sst1 filter
         utils::get_local_injector().receive_message("reload_reclaimed_components/pause");
         REQUIRE_EVENTUALLY_EQUAL(sst1->filter_memory_size(), sst1_bf_memory);
+        REQUIRE_EVENTUALLY_EQUAL(sst_mgr.get_total_memory_reclaimed(), sst3_bf_memory);
         BOOST_REQUIRE_EQUAL(sst_mgr.get_total_reclaimable_memory(), sst1_bf_memory);
-        BOOST_REQUIRE_EQUAL(sst_mgr.get_total_memory_reclaimed(), sst3_bf_memory);
 
         utils::get_local_injector().disable("reload_reclaimed_components/pause");
     }, {