Add the ability to specify the version of the CLI to install

now that the cli is in it's own repo, it will continue to have it's own release cadence.

this action will need to be updated so that the user can specify the version of the cli to fetch, and the logic for determining the latest version will need to be updated since it likely won't match the latest influxdb version.

Locate the action entry point and the logic that fetches the CLI and determines its latest version. Add support for a user-specified CLI version while keeping latest-version resolution independent of the InfluxDB release; verify that both explicit and latest-version installs work.

Written by the indexing model from the issue text.