[lldb] Use const reference for range variables to improve performance…

… (NFC)

Cppcheck recommends using a const reference for range variables in a for-each loop.
This avoids unnecessary copying of elements, improving performance.

Caught by cppcheck -
lldb/source/API/SBBreakpoint.cpp:717:22: performance: Range variable 'name' should be declared as const reference. [iterateByValue]
lldb/source/API/SBTarget.cpp:1150:15: performance: Range variable 'name' should be declared as const reference. [iterateByValue]
lldb/source/Breakpoint/Breakpoint.cpp:888:26: performance: Range variable 'name' should be declared as const reference. [iterateByValue]

Fix #91213
Fix #91217
Fix #91219

lldb/source/API/SBBreakpoint.cpp

@@ -714,7 +714,7 @@ void SBBreakpoint::GetNames(SBStringList &names) {
         bkpt_sp->GetTarget().GetAPIMutex());
     std::vector<std::string> names_vec;
     bkpt_sp->GetNames(names_vec);
-    for (std::string name : names_vec) {
+    for (const std::string &name : names_vec) {
       names.AppendString(name.c_str());
     }
   }

lldb/source/API/SBTarget.cpp

@@ -1147,7 +1147,7 @@ void SBTarget::GetBreakpointNames(SBStringList &names) {
 
     std::vector<std::string> name_vec;
     target_sp->GetBreakpointNames(name_vec);
-    for (auto name : name_vec)
+    for (const auto &name : name_vec)
       names.AppendString(name.c_str());
   }
 }

lldb/source/Breakpoint/Breakpoint.cpp

@@ -885,7 +885,7 @@ void Breakpoint::GetDescription(Stream *s, lldb::DescriptionLevel level,
         s->Printf("Names:");
         s->EOL();
         s->IndentMore();
-        for (std::string name : m_name_list) {
+        for (const std::string &name : m_name_list) {
           s->Indent();
           s->Printf("%s\n", name.c_str());
         }