Various dlopen/linking cleanups from #42100 (#42166)

- **bpf-util: rename from bpf-dlopen, unify version-specific symbol
handling**
- **cryptsetup: dlopen libcryptsetup in tokens**
- **tree-wide: dlopen libpam in pam plugins**
- **test-bus-marshal: dlopen() glib and libdbus instead of linking
directly**
- **lock-util: Simplify timeout for lock_generic_with_timeout()**
- **color-util: simplify hsv_to_rgb, fix rgb_to_hsv negative-hue wrap**
- **tree-wide: Use our own macros instead of fabs()/fmax()/fmin()**
- **locale-util: dlopen() libintl instead of linking against it**
- **home: Use log2u64() over log2()**
- **meson: drop libdl, threads, and librt dependencies**
- **libc: Use dlsym() from a constructor instead of weak symbols**
- **libc: Make sure C23 versions of strtol(), sscanf() are not used**

src/sysupdate/meson.build

@@ -30,7 +30,6 @@ executables += [
                 'dependencies' : [
                         libfdisk_cflags,
                         libopenssl_cflags,
-                        threads,
                 ],
         },
         libexec_template + {
@@ -38,7 +37,6 @@ executables += [
                 'dbus' : true,
                 'conditions' : ['ENABLE_SYSUPDATED'],
                 'sources' : files('sysupdated.c'),
-                'dependencies' : threads,
         },
         executable_template + {
                 'name' : 'updatectl',