Add support for iOS/iPadOS to osquery-perf

[lucasmrod]

#18119

• Added support on fleet's osquery simulator cmd/osquery-perf for new osquery data ingestion features.

Sample on how to simulate 50 iPads and 50 iPhones:

go run ./cmd/osquery-perf -host_count 100 -os_templates iphone_14.6.tmpl:50,ipad_13.18.tmpl:50 -mdm_scep_challenge <...>

[mna]

Awesome to already have that supported for load tests!

[mna]

Just wondering if it wouldn't be better for future maintainability to have this iDevice thing part of the agent as for the other hosts, or maybe create a distinct agent type and have a constructor function take care of returning the right agent based on the template?

Not a blocker, just that osquery-perf is already very "loosely organized" and it is a bit tricky to understand and maintain. Maybe for some future work, to refactor some of this (not just iDevice stuff).

[lucasmrod]

Agree, this is on my mind.

I did not go that route because current iteration required us testing for ~100 apple devices and also due to time constraints :). As soon as we require support for a bigger number we should do some refactoring (and factor in the refactor during estimation).

[codecov]

Codecov Report

Attention: Patch coverage is 6.49351% with 72 lines in your changes missing coverage. Please review.

Project coverage is 63.26%. Comparing base (0265554) to head (88bda06).
Report is 64 commits behind head on main.

Files	Patch %	Lines
cmd/osquery-perf/agent.go	0.00%	52 Missing ⚠️
pkg/mdm/mdmtest/apple.go	20.00%	19 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main   #19522       +/-   ##
===========================================
- Coverage   69.81%   63.26%    -6.55%     
===========================================
  Files          15      984      +969     
  Lines         921   120661   +119740     
  Branches       75       75               
===========================================
+ Hits          643    76342    +75699     
- Misses        277    38116    +37839     
- Partials        1     6203     +6202     

Flag	Coverage Δ
backend	63.21% <6.49%> (?)

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[lucasmrod]

Merging as the Docker publish looks unrelated (probably related to the move to Goreleaser 2.0)