rptest: reduce cache eviction throttling for tiny cache stress test

This is similar to the fix applied in
#22796 commit 7763669
which is needed after carryover trim was disabled and we hit cache
trimming throttling making the test slower than our threshold

Fixes #13648
CORE-1464

(cherry picked from commit b5faa6d)

tests/rptest/scale_tests/tiered_storage_cache_stress_test.py

@@ -64,6 +64,7 @@ def setUp(self):
             'cloud_storage_manifest_max_upload_interval_sec':
             self.manifest_upload_interval,
             'disable_public_metrics': False,
+            'cloud_storage_cache_check_interval': 500,
         }
         self.redpanda.set_extra_rp_conf(extra_rp_conf)