support setting optimization levels

[longemen3000]

Hello,

as far as i know, from reading

julia-runtest/action.yml

Lines 61 to 80 in 9ed3aa0

	- run: |
	# The Julia command that will be executed
	julia_cmd=( julia --color=yes --inline=${{ inputs.inline }} --project=${{ inputs.project }} -e 'include(joinpath(ENV["GITHUB_ACTION_PATH"], "test_harness.jl"))' -- ${{inputs.test_args}} )
	# Add the prefix in front of the command if there is one
	prefix=( ${{ inputs.prefix }} )
	[[ -n ${prefix[*]} ]] && julia_cmd=( "${prefix[@]}" "${julia_cmd[@]}" )
	# Run the Julia command
	echo "::debug::Executing Julia: ${julia_cmd[*]}"
	"${julia_cmd[@]}"
	shell: bash
	env:
	ANNOTATE: ${{ inputs.annotate }}
	COVERAGE: ${{ inputs.coverage }}
	FORCE_LATEST_COMPATIBLE_VERSION: ${{ inputs.force_latest_compatible_version }}
	CHECK_BOUNDS: ${{ inputs.check_bounds }}
	COMPILED_MODULES: ${{ inputs.compiled_modules }}
	ALLOW_RERESOLVE: ${{ inputs.allow_reresolve }}
	DEPWARN: ${{ inputs.depwarn }}

, there is no way to set the optimization level of the julia process being used to run the tests.

Packages with DifferentiationInterface.jl take most of their testing time compiling methods, and a speedup via setting the optimization level could help in that regard.