Optional parameter to turn off the PDF generation

[GSadee]

I'm introducing the new parameter to turn off the PDF generation:

sylius_invoicing:
    pdf_generator:
        enabled: false

The main reason for adding this parameter is to not force wkhtmtopdf to be installed.

[lchrusciel]

if only these two steps are different perhaps we can plug this build again to the the main one with included following values:

                php: "8.1"
                symfony: "^5.4"
                sylius: "~1.11.0"
                node: "14.x"
                mysql: "8.0"
                pdf: false

and the add

Suggested change

	-
	name: Remove wkhtmltopdf binary
	run: rm tests/Application/etc/wkhtmltopdf
	-
	name: Disable PDF generation
	run: mv tests/Application/etc/sylius_invoicing_pdf_generation_disabled.yaml tests/Application/config/packages
	-
	name: Remove wkhtmltopdf binary
	if: matrix.pdf != ''
	run: rm tests/Application/etc/wkhtmltopdf
	-
	name: Disable PDF generation
	if: matrix.pdf != ''
	run: mv tests/Application/etc/sylius_invoicing_pdf_generation_disabled.yaml tests/Application/config/packages