Install necessary packages for mysql on RHEL8

[ChandlerSwift]

Several commands require a mysql binary to be installed, for example

- name: "MySQL | Get current value for innodb_default_row_format"
  shell: |
    set -euo pipefail
    mysql -h {{ zabbix_server_dbhost }} -u{{ zabbix_server_dbuser }} \
    -p'{{ zabbix_server_dbpassword }}' \
    -e 'SHOW VARIABLES;' 2>&1 | grep innodb_default_row_format \
    | awk '{print $2}' | tr [:upper:] [:lower:]
  register: mysql_innodb_default_row_format
  args:
    executable: /bin/bash
  changed_when: False
  become: true

Also, the mysql_db module requires PyMySQL for python3. (Python3 is
the default version of python on RHEL8.)
https://docs.ansible.com/ansible/2.9/modules/mysql_db_module.html#requirements

SUMMARY

ISSUE TYPE

• Bugfix Pull Request
• Docs Pull Request
• Feature Pull Request
• New Module Pull Request

COMPONENT NAME

ADDITIONAL INFORMATION

[dj-wasabi]

Thanks! 👍