_coordinate not defined for `LatLong` points

This leads to problems with Remapper.

```
MethodError: no method matching _coordinate(::ClimaCore.Geometry.LatLongPoint{Float64}, ::Val{1})

Closest candidates are:
_coordinate(::ClimaCore.Geometry.XZPoint, ::Val{1})
@ ClimaCore ~/.julia/packages/ClimaCore/ANgUC/src/Geometry/coordinates.jl:171
_coordinate(::ClimaCore.Geometry.YZPoint, ::Val{1})
@ ClimaCore ~/.julia/packages/ClimaCore/ANgUC/src/Geometry/coordinates.jl:176
_coordinate(::ClimaCore.Geometry.Abstract1DPoint, ::Val{1})
@ ClimaCore ~/.julia/packages/ClimaCore/ANgUC/src/Geometry/coordinates.jl:162
...

Stacktrace:
[1] coordinate(pt::ClimaCore.Geometry.LatLongPoint{Float64}, ax::Int64)
@ ClimaCore.Geometry ~/.julia/packages/ClimaCore/ANgUC/src/Geometry/coordinates.jl:191
[2] containing_element(mesh::ClimaCore.Meshes.RectilinearMesh{ClimaCore.Meshes.IntervalMesh{ClimaCore.Domains.IntervalDomain{ClimaCore.Geometry.LongPoint{Float64}, Tuple{Symbol, Symbol}}, LinRange{ClimaCore.Geometry.LongPoint{Float64}, Int64}}, ClimaCore.Meshes.IntervalMesh{ClimaCore.Domains.IntervalDomain{ClimaCore.Geometry.LatPoint{Float64}, Tuple{Symbol, Symbol}}, LinRange{ClimaCore.Geometry.LatPoint{Float64}, Int64}}}, coord::ClimaCore.Geometry.LatLongPoint{Float64})
```

I found that I had to define them like this:
```julia
ClimaCore.Geometry._coordinate(
pt::ClimaCore.Geometry.LatLongPoint,
::Val{1},
) = ClimaCore.Geometry.LongPoint(pt.long)
ClimaCore.Geometry._coordinate(
pt::ClimaCore.Geometry.LatLongPoint,
::Val{2},
) = ClimaCore.Geometry.LatPoint(pt.lat)
```
That is, flipping the value with respect to the order implied by the name. If I have them with the same order, the error is:
```
promotion of types ClimaCore.Geometry.LatPoint{Float64} and ClimaCore.Geometry.LongPoint{Float64} failed to change any arguments
Stacktrace:
[1] error(::String, ::String, ::String)
@ Base ./error.jl:44
[2] sametype_error(input::Tuple{ClimaCore.Geometry.LatPoint{Float64}, ClimaCore.Geometry.LongPoint{Float64}})
@ Base ./promotion.jl:417
[3] not_sametype(x::Tuple{ClimaCore.Geometry.LatPoint{Float64}, ClimaCore.Geometry.LongPoint{Float64}}, y::Tuple{ClimaCore.Geometry.LatPoint{Float64}, ClimaCore.Geometry.LongPoint{Float64}})
@ Base ./promotion.jl:411
[4] promote
@ ./promotion.jl:394 [inlined]
[5] isless(x::ClimaCore.Geometry.LatPoint{Float64}, y::ClimaCore.Geometry.LongPoint{Float64})
@ ClimaCore.Geometry ~/.julia/packages/ClimaCore/ANgUC/src/Geometry/coordinates.jl:225
[6] lt(o::Base.Order.ForwardOrdering, a::ClimaCore.Geometry.LatPoint{Float64}, b::ClimaCore.Geometry.LongPoint{Float64})
@ Base.Order ./ordering.jl:117
[7] searchsortedlast
@ ./sort.jl:196 [inlined]
[8] searchsortedlast
@ ./sort.jl:290 [inlined]
[9] searchsortedlast
@ ./sort.jl:292 [inlined]
[10] containing_element
@ ~/.julia/packages/ClimaCore/ANgUC/src/Meshes/interval.jl:66 [inlined]
[11] containing_element(mesh::ClimaCore.Meshes.RectilinearMesh{ClimaCore.Meshes.IntervalMesh{ClimaCore.Domains.IntervalDomain{ClimaCore.Geometry.LongPoint{Float64}, Tuple{Symbol, Symbol}}, LinRange{ClimaCore.Geometry.LongPoint{Float64}, Int64}}, ClimaCore.Meshes.IntervalMesh{ClimaCore.Domains.IntervalDomain{ClimaCore.Geometry.LatPoint{Float64}, Tuple{Symbol, Symbol}}, LinRange{ClimaCore.Geometry.LatPoint{Float64}, Int64}}}, coord::ClimaCore.Geometry.LatLongPoint{Float64})
@ ClimaCore.Meshes ~/.julia/packages/ClimaCore/ANgUC/src/Meshes/rectangle.jl:131
[12] containing_pid
@ ~/.julia/packages/ClimaCore/ANgUC/src/Remapping/distributed_remapping.jl:100 [inlined]
[13] #20
@ ~/.julia/packages/ClimaCore/ANgUC/src/Remapping/distributed_remapping.jl:115 [inlined]
```

This is due to the fact that we typically put longitude as first dimension.

Start in Geometry/coordinates.jl at the _coordinate and coordinate methods, then trace their callers in Meshes/rectangle.jl and Remapping/distributed_remapping.jl. Confirm the expected longitude-first mapping for LatLongPoint and verify that containing_element and distributed remapping no longer raise the reported method or promotion errors.

Written by the indexing model from the issue text.