Auto-install odo binary with Backstage plugin

[rm3l]

As a Backstage integrator, I would like the odo plugin to automatically install the odo binary for my current OS/Arch, so that I don't have to manually download and install odo.
Currently, the custom actions plugin assumes there is already an odo binary available on the system the Backstage instance is running on.

https://github.com/rm3l/backstage-odo-devfile-plugin

Acceptance Criteria

• It should automatically download the right odo binary when I install the Backstage plugin with yarn add. This is do-able via a postinstall hook: https://docs.npmjs.com/cli/v10/using-npm/scripts
• It should not worry about the offline/airgap mode
• The plugin should install the latest version of odo at this time, i.e., 3.15.0 (not latest)
• It should download the right archive from https://mirror.openshift.com/pub/openshift-v4/clients/odo/ and unarchive it
• It should verify checksums of the files downloaded to ensure their integrity
• It should cache the files downloaded for a given version, so that installing the plugin twice can be much faster.
• The custom actions should use odo from the downloaded path, and if it does not exist, they should expect it to be available on the system PATH

[rm3l]

Done in https://github.com/rm3l/backstage-odo-devfile-plugin/tree/0.16.7

Installing the scaffolder-odo-actions plugin now automatically fetches the right odo binary for the current operating system and architecture, and the custom actions can use that path.
This behavior is entirely customizable by users, either by:

• specifying an explicit version of odo;
• or by skipping the automatic download and manually providing a path to the odo binary (case of offline/airgap installations)

Tested on both Linux and Windows.

More details in the README file: https://github.com/rm3l/backstage-odo-devfile-plugin/blob/main/packages/scaffolder-odo-actions-backend/README.md