add P_theta flux register and scale pressure using area and volume #1308

	name: OrszagTang

	on: [pull_request]
	jobs:
	OrszagTang-3d:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Get submodules
	run: \|
	git submodule update --init
	cd external/Microphysics
	git fetch; git checkout development
	cd ../amrex
	git fetch; git checkout development
	cd ../..

	- name: Install dependencies
	run: \|
	sudo apt-get update -y -qq
	sudo apt-get -qq -y install curl cmake jq clang g++>=9.3.0 libopenmpi-dev openmpi-bin

	- name: Compile OrszagTang
	run: \|
	cd Exec/mhd_tests/OrszagTang
	make USE_MPI=TRUE -j 4

	- name: Run OrszagTang-3d
	run: \|
	cd Exec/mhd_tests/OrszagTang
	mpirun -np 2 ./Castro3d.gnu.MPI.ex inputs.test amr.plot_files_output=1

	- name: Build the fextrema tool
	run: \|
	cd external/amrex/Tools/Plotfile
	make programs=fextrema -j 4

	- name: Check the extrema
	run: \|
	cd Exec/mhd_tests/OrszagTang
	../../../external/amrex/Tools/Plotfile/fextrema.gnu.ex plt00010 > fextrema.out
	diff fextrema.out ci-benchmarks/OrszagTang-3d.out

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