Remove references

[leodido]

What type of PR is this?

/kind cleanup

Any specific area of the project related to this PR?

NONE

What this PR does / why we need it:

Removes some more unnecessary, legacy references to Falco in Sysdig.

Does this PR introduce a user-facing change?:

update(docker): use HOST_ROOT environment variable rather than SYSDIG_HOST_ROOT
update: EF_DROP_FALCO is now EF_DROP_SIMPLE_CONS
update: puppet module had been renamed from "sysdig-falco" to "falco"

[poiana]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
To fully approve this pull request, please assign additional approvers.
We suggest the following additional approver: leodido

If they are not already assigned, you can assign the PR to them by writing /assign @leodido in a comment when ready.

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[leodido]

Closed in favor of #922 for using the convention of testing the branches with the same name together.