Remove all default privileged plugins

[6543]

re-add plugins to the list via config if needed

[woodpecker-bot]

Tearing down https://woodpecker-ci-woodpecker-pr-4053.surge.sh

[6543]

I'm personally in fafour of #3918

[6543]

#4056 in combination with #3918 should be good enouth in my poinion ...

[codecov]

Codecov Report

Attention: Patch coverage is 25.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 26.94%. Comparing base (5b208d2) to head (1a83e73).

Files with missing lines	Patch %	Lines
cli/exec/exec.go	0.00%	4 Missing ⚠️
cli/lint/lint.go	0.00%	1 Missing ⚠️
cmd/server/setup.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4053      +/-   ##
==========================================
- Coverage   26.96%   26.94%   -0.03%     
==========================================
  Files         394      394              
  Lines       27416    27418       +2     
==========================================
- Hits         7393     7388       -5     
- Misses      19323    19330       +7     
  Partials      700      700              

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[pat-s]

For the overall issue: I don't see why we should keep only our plugins and I am in favor of removing all from the list.

Besides, similar to my comment in #3918, I think that we are lacking documentation about this change and it should be included in the PR that will be chosen in the end.
As this happened a few times in the past for user-visible changes, I would be really happy to see this being addressed this time.

Last, I think that WOODPECKER_ESCALATED is a strange var name as it doesn't really indicate what "exactly" the setting is doing. Yes, it "escalates" something but that word per se has multiple meanings and is often rather used in a different context.
Why not something more specific like WOODPECKER_ALLOW_PRIVILEGED or WOODPECKER_PLUGINS_PRIVILEGED?

[6543]

created woodpecker-ci/infrastructure#91