maint: remove explicit Files: tests/init.sh; depend on test-framework-sh

maint: remove explicit Files: tests/init.sh; depend on test-framework-sh

* modules/atexit-tests: Rather than listing tests/init.sh,
now that there's a module for it, simply depend on that new module.
* modules/closein-tests: Likewise.
* modules/exclude-tests: Likewise.
* modules/getcwd-tests: Likewise.
* modules/perror-tests: Likewise.
* modules/pread-tests: Likewise.
* modules/pwrite-tests: Likewise.
* modules/vc-list-files-tests: Likewise.
* modules/verify-tests: Likewise.
* modules/xalloc-die-tests: Likewise.
* modules/xstrtoimax-tests: Likewise.
* modules/xstrtol-tests: Likewise.
* modules/xstrtoll-tests: Likewise.
* modules/xstrtoumax-tests: Likewise.
* modules/yesno-tests: Likewise.