CircleCI: make all java distributed tests run in Medium containers

patch by Ekaterina Dimitrova; reviewed by Andres de la Pena for CASSANDRA-18503

.circleci/config.yml.PAID

@@ -21,7 +21,7 @@ jobs:
   j8_jvm_upgrade_dtests:
     docker:
     - image: apache/cassandra-testing-ubuntu2004-java11-w-dependencies:latest
-    resource_class: xlarge
+    resource_class: medium
     working_directory: ~/
     shell: /bin/bash -eo pipefail -l
     parallelism: 4
@@ -1780,7 +1780,7 @@ jobs:
   j8_jvm_upgrade_dtests_repeat:
     docker:
     - image: apache/cassandra-testing-ubuntu2004-java11-w-dependencies:latest
-    resource_class: large
+    resource_class: medium
     working_directory: ~/
     shell: /bin/bash -eo pipefail -l
     parallelism: 25
@@ -3194,7 +3194,7 @@ jobs:
   j8_jvm_dtests:
     docker:
     - image: apache/cassandra-testing-ubuntu2004-java11-w-dependencies:latest
-    resource_class: large
+    resource_class: medium
     working_directory: ~/
     shell: /bin/bash -eo pipefail -l
     parallelism: 10

.circleci/config_template.yml

@@ -143,6 +143,12 @@ j8_small_par_executor: &j8_small_par_executor
     #exec_resource_class: xlarge
   parallelism: 1
 
+j8_small_parallel_executor: &j8_small_parallel_executor
+  executor:
+    name: java8-executor
+    #exec_resource_class: xlarge
+  parallelism: 1
+
 j8_small_executor: &j8_small_executor
   executor:
     name: java8-executor
@@ -598,7 +604,7 @@ jobs:
           classlistprefix: distributed
 
   j8_jvm_upgrade_dtests:
-    <<: *j8_medium_par_executor
+    <<: *j8_small_parallel_executor
     steps:
       - attach_workspace:
           at: /home/cassandra

.circleci/config_template.yml.PAID.patch

@@ -1,6 +1,6 @@
---- config-2_1.yml	2023-02-02 21:03:34.000000000 -0500
-+++ config-2_1.yml.MIDRES	2023-02-02 21:04:03.000000000 -0500
-@@ -134,14 +134,14 @@
+--- config_template.yml	2023-08-11 09:41:55.000000000 -0400
++++ config_template.yml.PAID	2023-08-11 09:44:44.000000000 -0400
+@@ -134,20 +134,20 @@
  j8_par_executor: &j8_par_executor
    executor:
      name: java8-executor
@@ -14,12 +14,20 @@
      name: java8-executor
 -    #exec_resource_class: xlarge
 -  parallelism: 1
-+    exec_resource_class: large
++    exec_resource_class: medium
 +  parallelism: 10
  
+ j8_small_parallel_executor: &j8_small_parallel_executor
+   executor:
+     name: java8-executor
+-    #exec_resource_class: xlarge
+-  parallelism: 1
++    exec_resource_class: medium
++  parallelism: 4
+ 
  j8_small_executor: &j8_small_executor
    executor:
-@@ -152,34 +152,51 @@
+@@ -158,34 +158,51 @@
  j8_medium_par_executor: &j8_medium_par_executor
    executor:
      name: java8-executor
@@ -72,12 +80,12 @@
    executor:
      name: java8-executor
 -  parallelism: 4
-+    exec_resource_class: large
++    exec_resource_class: medium
 +  parallelism: 25
  
  separate_jobs: &separate_jobs
    jobs:
-@@ -647,7 +664,7 @@
+@@ -653,7 +670,7 @@
            target: stress-test
  
    j8_dtests_vnode:
@@ -86,7 +94,7 @@
      steps:
        - attach_workspace:
            at: /home/cassandra
-@@ -661,7 +678,7 @@
+@@ -667,7 +684,7 @@
            pytest_extra_args: '--use-vnodes --num-tokens=32 --skip-resource-intensive-tests'
  
    j8_dtests:
@@ -95,7 +103,7 @@
      steps:
        - attach_workspace:
            at: /home/cassandra
-@@ -675,7 +692,7 @@
+@@ -681,7 +698,7 @@
            pytest_extra_args: '--skip-resource-intensive-tests'
  
    j8_dtests_large_vnode:
@@ -104,7 +112,7 @@
      steps:
        - attach_workspace:
            at: /home/cassandra
-@@ -689,7 +706,7 @@
+@@ -695,7 +712,7 @@
            pytest_extra_args: '--use-vnodes --num-tokens=32 --only-resource-intensive-tests --force-resource-intensive-tests'
  
    j8_dtests_large:
@@ -113,7 +121,7 @@
      steps:
        - attach_workspace:
            at: /home/cassandra
-@@ -703,7 +720,7 @@
+@@ -709,7 +726,7 @@
            pytest_extra_args: '--num-tokens=32 --only-resource-intensive-tests --force-resource-intensive-tests'
  
    j8_upgrade_dtests:
@@ -122,7 +130,7 @@
      steps:
        - attach_workspace:
            at: /home/cassandra
-@@ -858,7 +875,7 @@
+@@ -864,7 +881,7 @@
            count: ${REPEATED_UPGRADE_DTESTS_COUNT}
  
    j8_dtests_offheap:

.circleci/readme.md

@@ -101,7 +101,7 @@ generate.sh -p \
   -e REPEATED_LARGE_DTESTS=replace_address_test.py::TestReplaceAddress::test_replace_stopped_node \
   -e REPEATED_JVM_DTESTS=org.apache.cassandra.distributed.test.PagingTest#testPaging \
   -e REPEATED_UPGRADE_DTESTS=upgrade_tests/cql_tests.py \
-  -e REPEATED_JVM_UPGRADE_DTESTS=org.apache.cassandra.distributed.upgrade.GroupByTest
+  -e REPEATED_JVM_UPGRADE_DTESTS=org.apache.cassandra.distributed.upgrade.PagingTest
 ```
 If you need to repeat a particular set of tests and avoid automatic detection of changed tests 
 use the -s command line option.