initcontainer in the k8s examples should be updated

[leogr]

Since the falcosecurity/probeloader image is not supported anymore, we need to update the way the initcontainer works here.
Now, the driver can be installed by using the falco-driver-loader script that's provided within official Falco's images.

Also, I believe that we don't need falcoctl in this process and the download URL is not needed anymore here since falcosecurity/falco#1158

Additional context

The new approach is going to be documented soon 👉 falcosecurity/falco-website#186

See @leodido comments:

• chore(deps): bump protobuf from 3.15.0 to 3.18.3 in /integrations/falco-phoenix-sidecar contrib#3 (review)
• chore(deps): bump protobuf from 3.15.0 to 3.18.3 in /integrations/falco-phoenix-sidecar contrib#3 (comment)

cc @maxgio92

[leogr]

A new approach for the initcontainer 👉 falcosecurity/falco#1171

[maxgio92]

@leogr thanks, I’d wait then for the driverloader image implementation

[leogr]

See #25