tec: Add a test target to Makefile (#2725)

* tec: Add a test target to Makefile

Minor edit put php7-phar on third line

I try to keep on the third line the Alpine-specific PHP extensions (i.e.
that are not by default in Ubuntu), and in alphabetic order

Co-Authored-By: Alexandre Alapetite <alexandre@alapetite.fr>

* Allow to run make test without Docker
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