TEST-73-LOCALE: skip lv keymap and friends

TEST-73-LOCALE: skip lv keymap and friends

The following failure should be in libxkbcommon and/or sanitizer.
There is nothing we can do here. Let's skip it.

```
TEST-73-LOCALE.sh[3733]: + assert_rc 0 localectl set-keymap lv
TEST-73-LOCALE.sh[6699]: + set +ex
TEST-73-LOCALE.sh[6700]: Failed to set keymap: Remote peer disconnected
TEST-73-LOCALE.sh[6703]: FAIL: expected: '0' actual: '1'
TEST-73-LOCALE.sh[157]: + rm -f /etc/dbus-1/system.d/systemd-localed-read-only.conf
[FAILED] Failed to start TEST-73-LOCALE.service - TEST-73-LOCALE.
```
```
==3719==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x7fa51f161000 at pc 0x7fa521250be4 bp 0x7ffe49130a80 sp 0x7ffe49130240
READ of size 19126 at 0x7fa51f161000 thread T0
    #0 0x7fa521250be3 in strndup (/usr/lib/clang/20/lib/x86_64-redhat-linux-gnu/libclang_rt.asan.so+0x50be3) (BuildId: aa6231e817f72469c44a6c6cee9f0694a87db7fb)
    #1 0x7fa51f128325  (/lib64/libxkbcommon.so.0+0x1c325) (BuildId: 72e8cb985db37963272d140f7b2aee551c465ff5)
    #2 0x7fa51f121952  (/lib64/libxkbcommon.so.0+0x15952) (BuildId: 72e8cb985db37963272d140f7b2aee551c465ff5)
    #3 0x7fa51f123d3a  (/lib64/libxkbcommon.so.0+0x17d3a) (BuildId: 72e8cb985db37963272d140f7b2aee551c465ff5)
    #4 0x7fa51f117c86  (/lib64/libxkbcommon.so.0+0xbc86) (BuildId: 72e8cb985db37963272d140f7b2aee551c465ff5)
    #5 0x7fa51f12548f  (/lib64/libxkbcommon.so.0+0x1948f) (BuildId: 72e8cb985db37963272d140f7b2aee551c465ff5)
    #6 0x7fa51f125c9e  (/lib64/libxkbcommon.so.0+0x19c9e) (BuildId: 72e8cb985db37963272d140f7b2aee551c465ff5)
    #7 0x7fa51f126a59  (/lib64/libxkbcommon.so.0+0x1aa59) (BuildId: 72e8cb985db37963272d140f7b2aee551c465ff5)
    #8 0x7fa51f12cec6  (/lib64/libxkbcommon.so.0+0x20ec6) (BuildId: 72e8cb985db37963272d140f7b2aee551c465ff5)
    #9 0x7fa51f12e3c2  (/lib64/libxkbcommon.so.0+0x223c2) (BuildId: 72e8cb985db37963272d140f7b2aee551c465ff5)
    #10 0x7fa51f12a4e5 in xkb_keymap_new_from_names (/lib64/libxkbcommon.so.0+0x1e4e5) (BuildId: 72e8cb985db37963272d140f7b2aee551c465ff5)
    #11 0x5574dd63f864 in verify_xkb_rmlvo /usr/src/debug/systemd/src/locale/xkbcommon-util.c:69:14
(snip)
```

(cherry picked from commit 18609909d93a4d17e962b47e51fffe38845e99f5)