update(docker/event-generator): remove the event-generator

[leogr]

What type of PR is this?

Uncomment one (or more) /kind <> lines:

/kind bug

/kind cleanup

/kind design

/kind documentation

/kind failing-test

/kind feature

If contributing rules or changes to rules, please make sure to also uncomment one of the following line:

/kind rule-update

/kind rule-create

Any specific area of the project related to this PR?

Uncomment one (or more) /area <> lines:

/area build

/area engine

/area examples

/area rules

/area integrations

/area tests

/area proposals

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #1089

Special notes for your reviewer:

1. This PR deliberately ignore any references to the event-generator that's still included below /integrations because of Move "integrations" to another repo #1145
2. There are some references to the event-generator below /test, those refer to previously built traces that can be left as-is.
3. This PR should be kept on hold until the first version of the new event-generator is out

/hold

Does this PR introduce a user-facing change?:

update(docker/event-generator): remove the event-generator from Falco repository

[leogr]

event-generator ready, still on hold for falcosecurity/falco-website#185
cc @leodido

[poiana]

LGTM label has been added.

Git tree hash: 6c420c57b2cbb0ceb3f5b1a91b602d0fe1b59d0e

[leogr]

DONE falcosecurity/falco-website#187
/hold cancel

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fntlnz, leodido

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 [fntlnz,leodido]

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