Use lexical-binding in most progmodes tests

Use lexical-binding in most progmodes tests

* test/lisp/progmodes/etags-tests.el:
* test/lisp/progmodes/f90-tests.el:
* test/lisp/progmodes/ps-mode-tests.el:
* test/lisp/progmodes/python-tests.el:
* test/lisp/progmodes/ruby-mode-tests.el:
* test/lisp/progmodes/subword-tests.el:
* test/lisp/progmodes/tcl-tests.el:
* test/lisp/progmodes/xref-tests.el: Use lexical-binding.

* test/lisp/progmodes/python-tests.el (python-tests-visible-string)
(python-tests-look-at-1, python-tests-look-at-2)
(python-shell-calculate-process-environment-2): Silence byte-compiler.