Ipopt returns `OTHER_ERROR` instead of `NUMERICAL_ERROR` on case5

[langestefan]

Since Ipopt v1.15.0, the case5.m power flow solves in test/pf.jl:30 and test/pf-native.jl return OTHER_ERROR on linux. This causes the ubuntu CI to fail the NUMERICAL_ERROR assertions.

PowerModels.jl/test/pf.jl

Lines 23 to 32 in dd45675

	@testset "5-bus transformer swap case" begin
	result = solve_pf("../test/data/matpower/case5.m", ACPPowerModel, nlp_solver)
	# compat for Julia v1.6 on windows (01/19/24)
	if result["termination_status"] == LOCALLY_SOLVED
	@test isapprox(result["objective"], 0; atol = 1e-2)
	else
	@test result["termination_status"] == NUMERICAL_ERROR
	end
	end

Example failing run: https://github.com/lanl-ansi/PowerModels.jl/actions/runs/30967875691

[odow]

See #1010.

The PowerModels tests are pretty flakey to different versions of solvers/machines etc. It would be helpful to understand why they are and if we could make changes to make them less flakey.

[odow]

Closed by #1010