fix: Oracle paths for minor versions use major version directory.

[adamfranco]

Minor versions were not usable because they are in a directory based on the major version (first two places) while the specific minor version uses all 6 places.

For example, https://www.oracle.com/database/technologies/instant-client/linux-x86-64-downloads.html lists the RPM URL as:

https://download.oracle.com/otn_software/linux/instantclient/2390000/oracle-instantclient-basic-23.9.0.25.07-1.el8.x86_64.rpm

Previously downloads were failing because the replacement for the directory component was using all version places like:
https://download.oracle.com/otn_software/linux/instantclient/23902507/oracle-instantclient-basic-23.9.0.25.07-1.el8.x86_64.rpm
which results in a 404 error since the directory is wrong.

This role can now successfully specify a minor version like:

- name: Install oracle client
  hosts: my_hosts
  roles:
  - role: ecgalaxy.oracle_instantclient
    vars:
      oracle_instantclient_version: "23.9.0.25.07"
    become: yes