src/basic: rename uid-alloc-range.[ch] to uid-classification.[ch]

We had both uid-range.h and uid-alloc-range.h. The latter now contains helpers
like {uid,gid}_is_{system,dynamic,container}(), uid_for_system_journal(), so
the existing name is outdated. I think the uid-range.[ch] should stay separate
because it has a bunch of helpers for parsing and printing of uid ranges. So
let's rename as in $subject to better reflect the contents of the file and make
the two sets of files harder to confuse.

src/test/meson.build

@@ -171,7 +171,7 @@ simple_tests += files(
         'test-terminal-util.c',
         'test-tmpfile-util.c',
         'test-udev-util.c',
-        'test-uid-alloc-range.c',
+        'test-uid-classification.c',
         'test-uid-range.c',
         'test-umask-util.c',
         'test-unaligned.c',

src/test/test-condition.c

@@ -41,7 +41,7 @@
 #include "tests.h"
 #include "tmpfile-util.h"
 #include "tomoyo-util.h"
-#include "uid-alloc-range.h"
+#include "uid-classification.h"
 #include "user-util.h"
 #include "virt.h"
 

src/test/test-uid-classification.c

@@ -9,7 +9,7 @@
 #include "fs-util.h"
 #include "tests.h"
 #include "tmpfile-util.h"
-#include "uid-alloc-range.h"
+#include "uid-classification.h"
 
 static void test_read_login_defs_one(const char *path) {
         log_info("/* %s(\"%s\") */", __func__, path ?: "<custom>");