GHA/configure-vs-cmake: add Windows build, fix issues

- configure: disable pthreads by default on Windows.
- configure: disable detecting `fseeko()` on Windows.
  (It exists in mingw-w64 2.0.0 and newer, but it's permanently ignored
  in CMake, as this function is never necessary on Windows.)
- extend existing exceptions with their Windows variants.
- `lib/formdata.c`: prioritize `_fseeki64()` over `fseeko()`.
  To reduce the difference between Windows builds, which now all use
  `_fseeki64()`.
- cmake: perm-enable `HAVE_DIRENT_H` and `HAVE_OPENDIR` for mingw-w64,
  to match configure.
  Follow-up to bfe54b0e88 #13137
  This in theory could make the dir listing feature work in mingw-w64
  build, but in my tests (on WINE) it failed at the preceding `open()`
  call.
- cmake: perm-enable `HAVE_STRINGS_H` and `HAVE_UTIME_H` for mingw-w64,
  to match configure. (They are wrappers and make no difference in the build.)

Also:
- configure: sync `USE_MANUAL` macro with cmake, by only setting it for
  `src`. Drop checker exception.
- CI: use `--disable-dependency-tracking` in existing jobs.
- CI: install packages before git checkout, in existing jobs.

Closes #14678

CMake/Platforms/WindowsCache.cmake

@@ -41,6 +41,10 @@ if(MINGW)
   set(HAVE_SYS_PARAM_H 1)
   set(HAVE_SYS_TIME_H 1)
   set(HAVE_GETTIMEOFDAY 1)
+  set(HAVE_STRINGS_H 1)  # wrapper to string.h
+  set(HAVE_UTIME_H 1)  # wrapper to sys/utime.h
+  set(HAVE_DIRENT_H 1)
+  set(HAVE_OPENDIR 1)
 else()
   set(HAVE_LIBGEN_H 0)
   set(HAVE_STRCASECMP 0)
@@ -48,6 +52,10 @@ else()
   set(HAVE_SYS_PARAM_H 0)
   set(HAVE_SYS_TIME_H 0)
   set(HAVE_GETTIMEOFDAY 0)
+  set(HAVE_STRINGS_H 0)
+  set(HAVE_UTIME_H 0)
+  set(HAVE_DIRENT_H 0)
+  set(HAVE_OPENDIR 0)
   if(MSVC)
     set(HAVE_UNISTD_H 0)
     set(HAVE_LOCALE_H 1)
@@ -121,7 +129,6 @@ set(HAVE_IOCTL_SIOCGIFADDR 0)
 set(HAVE_POLL_H 0)
 set(HAVE_POLL_FINE 0)
 set(HAVE_PWD_H 0)
-set(HAVE_STRINGS_H 0)  # mingw-w64 has it (wrapper to string.h)
 set(HAVE_SYS_EVENTFD_H 0)
 set(HAVE_SYS_FILIO_H 0)
 set(HAVE_SYS_WAIT_H 0)
@@ -137,13 +144,9 @@ set(HAVE_SYS_UN_H 0)
 set(HAVE_SYS_UTIME_H 1)
 set(HAVE_TERMIOS_H 0)
 set(HAVE_TERMIO_H 0)
-set(HAVE_UTIME_H 0)  # mingw-w64 has it (wrapper to sys/utime.h)
 set(HAVE_LINUX_TCP_H 0)
 
-set(HAVE_DIRENT_H 0)
-set(HAVE_OPENDIR 0)
-
-set(HAVE_FSEEKO 0)
+set(HAVE_FSEEKO 0)  # mingw-w64 2.0.0 and newer has it
 set(HAVE__FSEEKI64 1)
 set(HAVE_SOCKET 1)
 set(HAVE_SELECT 1)