Allow loading modules from /dev/shm

Summary: On production machines, it looks like our [XAR](https://www.internalfb.com/intern/wiki/Python/Python_Packaging/XAR/)-based Python bundles are mounted into `/dev/shm/` instead of `/mnt/xarfuse`. We're currently ignoring any module path that starts with `/dev/`, so I'm relaxing the path regex check to allow us to load modules from XARs.

Test Plan:
Before this patch, printing the backtrace on coredump `m29bktmqgek9s120` wouldn't show information for certain frames (e.g., frame #0 in the example below):
```
$ lldb /mnt/xarfuse/uid-540188/4e1bfb91-seed-nspid4026531836_cgpid18240-ns-4026531841/runtime/bin/llama-sheriff#native-main#platform-runtime#python#py_version_3_10   -c m29bktmqgek9s120
(lldb) target create "/mnt/xarfuse/uid-540188/4e1bfb91-seed-nspid4026531836_cgpid18240-ns-4026531841/runtime/bin/llama-sheriff#native-main#platform-runtime#python#py_version_3_10" --core "m29bktmqgek9s120"
Core file '/home/alexandreperez/temp/llama/m29bktmqgek9s120' (x86_64) was loaded.
(lldb) bt
* thread #1, name = 'llama-sheriff#n', stop reason = signal SIGSEGV
  * frame #0: 0x00005633b351bdcf
    frame #1: 0x00007f2573c97790 libc.so.6`__GI___nptl_deallocate_tsd [inlined] __GI___nptl_deallocate_tsd at nptl_deallocate_tsd.c:74:29
    frame #2: 0x00007f2573c9771b libc.so.6`__GI___nptl_deallocate_tsd at nptl_deallocate_tsd.c:23:1
    frame llvm#3: 0x00007f2573c9aada libc.so.6`start_thread(arg=<unavailable>) at pthread_create.c:445:3
    frame llvm#4: 0x00007f2573d2d17c libc.so.6`__clone3 at clone3.S:81
(lldb)
```

After this diff:
```
$ lldb /mnt/xarfuse/uid-540188/4e1bfb91-seed-nspid4026531836_cgpid18240-ns-4026531841/runtime/bin/llama-sheriff#native-main#platform-runtime#python#py_version_3_10   -c m29bktmqgek9s120
(lldb) target create "/mnt/xarfuse/uid-540188/4e1bfb91-seed-nspid4026531836_cgpid18240-ns-4026531841/runtime/bin/llama-sheriff#native-main#platform-runtime#python#py_version_3_10" --core "m29bktmqgek9s120"
Core file '/home/alexandreperez/temp/llama/m29bktmqgek9s120' (x86_64) was loaded.
(lldb) bt
* thread #1, name = 'llama-sheriff#n', stop reason = signal SIGSEGV
  * frame #0: 0x00005633b351bdcf llama-sheriff#native-main#platform-runtime#python#py_version_3_10`folly::threadlocal_detail::StaticMetaBase::onThreadExit(void*) + 175
    frame #1: 0x00007f2573c97790 libc.so.6`__GI___nptl_deallocate_tsd [inlined] __GI___nptl_deallocate_tsd at nptl_deallocate_tsd.c:74:29
    frame #2: 0x00007f2573c9771b libc.so.6`__GI___nptl_deallocate_tsd at nptl_deallocate_tsd.c:23:1
    frame llvm#3: 0x00007f2573c9aada libc.so.6`start_thread(arg=<unavailable>) at pthread_create.c:445:3
    frame llvm#4: 0x00007f2573d2d17c libc.so.6`__clone3 at clone3.S:81
(lldb)
```

Reviewers: jeffreytan, gclayton, hyubo, #lldb_team

Reviewed By: hyubo

Subscribers: pdepetro, #python_debugging, #lldb_team

Differential Revision: https://phabricator.intern.facebook.com/D55261258

Author: aperez

lldb/source/Plugins/DynamicLoader/ModuleList-DYLD/DynamicLoaderDumpWithModuleList.cpp

@@ -173,7 +173,7 @@ void DynamicLoaderDumpWithModuleList::LoadAllModules(
 bool DynamicLoaderDumpWithModuleList::ShouldLoadModule(
     const std::string &module_name) {
   // Use a regular expression to match /dev/* path
-  static const std::regex pattern("^/dev/.*$");
+  static const std::regex pattern("^/dev/(?!shm.*).*$");
   return !std::regex_match(module_name, pattern);
 }