[rllib] disable failing tests that are not release blocking

cherrypick ray-project#60932

Signed-off-by: Lonnie Liu <lonnie@anyscale.com>

Author: aslonnie

release/release_tests.yaml

@@ -471,7 +471,8 @@
   group: Tune tests
   working_dir: ml_user_tests
 
-  frequency: nightly-3x
+  # TODO(rllib): https://github.com/anyscale/ray/issues/581
+  frequency: manual
   team: ml
 
   cluster:
@@ -843,7 +844,8 @@
   group: Long running tests
   working_dir: long_running_tests
 
-  frequency: weekly
+  # TODO(rllib): https://github.com/anyscale/ray/issues/568
+  frequency: manual
   team: rllib
 
   cluster:
@@ -855,7 +857,7 @@
     long_running: true
 
   smoke_test:
-    frequency: nightly
+    frequency: manual
 
     run:
       timeout: 3600
@@ -959,7 +961,8 @@
   group: Long running tests
   working_dir: long_running_tests
 
-  frequency: weekly
+  # TODO(rllib): https://github.com/anyscale/ray/issues/571
+  frequency: manual
   team: ml
 
   cluster:
@@ -977,7 +980,7 @@
 
 
   smoke_test:
-    frequency: nightly
+    frequency: manual
 
     run:
       timeout: 3600