Set up the Operator Node on Oracle Linux 8

Set up the operator node on an Oracle Linux 8 host. The operator node is used to perform an installation of Oracle Cloud Native Environment and a Kubernetes cluster.

To set up the operator node on Oracle Linux 8:

Install the oracle-olcne-release-el8 release package:
```
sudo dnf install oracle-olcne-release-el8
```

Enable the yum repositories.

For hosts running UEK R7, use:

sudo dnf config-manager --enable ol8_olcne15 ol8_addons ol8_baseos_latest ol8_appstream ol8_kvm_appstream ol8_UEKR7

For hosts running UEK R6, use:

sudo dnf config-manager --enable ol8_olcne15 ol8_addons ol8_baseos_latest ol8_appstream ol8_kvm_appstream ol8_UEKR6

For hosts running RHCK, use:

sudo dnf config-manager --enable ol8_olcne15 ol8_addons ol8_baseos_latest ol8_appstream ol8_kvm_appstream

Disable the following repositories:

sudo dnf config-manager --disable ol8_olcne14 ol8_olcne13 ol8_olcne12 ol8_developer

Install the olcnectl software package:
```
sudo dnf install olcnectl
```