PMM-7: Add support for Percona Server 8.4

pmm_qa/README.md

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+# WIP - PMM-QA Framework Documentation
+Sets up all types of dbs base one or with replication sets.
+
+Available flags:
+-
+- ```--database``` Sets up selected DB available options:
+  - ```ps``` - Sets up Percona server, example: ```--database ps=8.4,SETUP_TYPE=gr,QUERY_SOURCE=perfschema```
+    - parameters:
+      - SETUP_TYPE:
+        - gr - Group replication
+      - QUERY_SOURCE - The Performance Schema provides detailed, real-time metrics on various server 
+        performance aspects, while the Slow Query Log records queries that exceed a defined execution 
+        time threshold, helping to identify inefficient queries.
+        - perfschema
+        - slowlog
+      - COUNT - Count of percona server dbs created.
+    - Available versions: ```8.4```, ```8.0```, ```5.7```

pmm_qa/percona_server/init.sql.j2

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+-- Create replication user and grant necessary privileges
+SET SQL_LOG_BIN=0;
+CREATE USER '{{ replication_user }}'@'%' IDENTIFIED BY '{{ replication_password }}';
+GRANT REPLICATION SLAVE ON *.* TO '{{ replication_user }}'@'%';
+GRANT CONNECTION_ADMIN ON *.* TO '{{ replication_user }}'@'%';
+GRANT BACKUP_ADMIN ON *.* TO '{{ replication_user }}'@'%';
+GRANT GROUP_REPLICATION_STREAM ON *.* TO '{{ replication_user }}'@'%';
+-- GRANT SERVICE_CONNECTION_ADMIN ON *.* TO '{{ replication_user }}'@'%';
+-- GRANT SYSTEM_VARIABLES_ADMIN ON *.* TO '{{ replication_user }}'@'%';
+FLUSH PRIVILEGES;
+SET SQL_LOG_BIN=1;
+
+-- Configure group replication recovery credentials
+CHANGE REPLICATION SOURCE TO SOURCE_USER='{{ replication_user }}', SOURCE_PASSWORD='{{ replication_password }}' FOR CHANNEL 'group_replication_recovery';
+

pmm_qa/percona_server/my.cnf.j2

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+[mysqld]
+# General server configuration
+server_id={{ server_id_start + item - 1 }}
+bind-address=0.0.0.0
+port={{ mysql_listen_port }}
+
+# General replication settings
+gtid_mode=ON
+enforce_gtid_consistency=ON
+binlog_checksum=NONE
+log_bin=binlog
+log_replica_updates=ON
+disabled_storage_engines="MyISAM,BLACKHOLE,FEDERATED,ARCHIVE,MEMORY"
+lower_case_table_names=2 # MacOS-specific, but also good generally
+
+# MySQL 8.4 compatibility settings
+report_host=ps_pmm_{{ps_version}}_{{ item }}
+
+# Group Replication Settings
+plugin_load_add='group_replication.so'
+loose-group_replication_group_name='aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee'
+loose-group_replication_local_address='ps_pmm_{{ps_version}}_{{ item }}:{{ group_seeds_port }}'
+loose-group_replication_group_seeds='{% for i in range(1, nodes_count | int + 1) %}ps_pmm_{{ps_version}}_{{ i }}:{{ group_seeds_port }}{% if not loop.last %},{% endif %}{% endfor %}'
+loose-group_replication_communication_stack=XCOM
+
+# Group replication behavior
+loose-group_replication_start_on_boot=OFF
+loose-group_replication_bootstrap_group=OFF
+loose-group_replication_single_primary_mode=ON
+loose-group_replication_enforce_update_everywhere_checks=OFF
+
+# Recovery settings
+loose-group_replication_recovery_get_public_key=ON
+loose-group_replication_recovery_retry_count=10
+loose-group_replication_recovery_reconnect_interval=60
+
+# Crash-safe replication settings
+relay-log=ps_pmm_{{ps_version}}_{{ item }}-relay-bin
+relay_log_recovery=ON
+relay_log_purge=ON
+
+# Performance and connection settings
+max_connections=1000
+innodb_buffer_pool_size=256M
+