Add support for Hermitian PSD for conic inequality

[blegat]

Before this PR

@variable(model, x)
julia> @constraint(model, LinearAlgebra.Hermitian([1 x; x 1])>=0, HermitianPSDCone())
ERROR: At REPL[23]:1: `@constraint(model, LinearAlgebra.Hermitian([1 x; x 1]) >= 0, HermitianPSDCone())`: Unrecognized constraint building format. Tried to invoke `build_constraint(error, AffExpr[1 x; x 1], MathOptInterface.GreaterThan{Bool}(false), HermitianPSDCone())`, but no such method exists. This is due to specifying an unrecognized function, constraint set, and/or extra positional/keyword arguments.

If you're trying to create a JuMP extension, you need to implement `build_constraint` to accomodate these arguments.
Stacktrace:
 [1] error(::String, ::String)
   @ Base ./error.jl:44
 [2] (::JuMP.Containers.var"#error_fn#98"{String})(str::String)
   @ JuMP.Containers ~/.julia/dev/JuMP/src/Containers/macro.jl:325
 [3] build_constraint(error_fn::JuMP.Containers.var"#error_fn#98"{…}, func::Hermitian{…}, set::MathOptInterface.GreaterThan{…}, args::HermitianPSDCone; kwargs::@Kwargs{})
   @ JuMP ~/.julia/dev/JuMP/src/macros/@constraint.jl:781
 [4] build_constraint(error_fn::Function, func::Hermitian{…}, set::MathOptInterface.GreaterThan{…}, args::HermitianPSDCone)
   @ JuMP ~/.julia/dev/JuMP/src/macros/@constraint.jl:776
 [5] #build_constraint#81
   @ ~/.julia/dev/JuMP/src/macros/@constraint.jl:726 [inlined]
 [6] build_constraint(error_fn::Function, f::Hermitian{AffExpr, Matrix{AffExpr}}, set::Nonnegatives, args::HermitianPSDCone)
   @ JuMP ~/.julia/dev/JuMP/src/macros/@constraint.jl:719

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.35%. Comparing base (a39e241) to head (f4495c3).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3705   +/-   ##
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  Coverage   98.35%   98.35%           
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  Files          43       43           
  Lines        5707     5709    +2     
=======================================
+ Hits         5613     5615    +2     
  Misses         94       94           

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