[lldb] Don't leak LineSequence in PDB parsers

[teemperor]

Summary

InsertSequence doesn't take ownership of the pointer so releasing this pointer
is just leaking memory.

Follow up to D100806 that was fixing other leak sanitizer test failures

[JDevlieghere]

LGTM

lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp

static void TerminateLineSequence(LineTable &table,
                                   const LineFragmentHeader &block,
                                   lldb::addr_t base_addr, uint32_t file_number,
                                   uint32_t last_line,
                                   std::unique_ptr<LineSequence> seq) {
   // The end is always a terminal entry, so insert it regardless.
   table.AppendLineEntryToSequence(seq.get(), base_addr + block.CodeSize,
                                   last_line, 0, file_number, false, false,
                                   false, false, true);
-  table.InsertSequence(seq.release());
+  table.InsertSequence(seq.get());
 }
 
 bool SymbolFileNativePDB::ParseLineTable(CompileUnit &comp_unit) {
   // Unfortunately LLDB is set up to parse the entire compile unit line table
   // all at once, even if all it really needs is line info for a specific
   // function.  In the future it would be nice if it could set the sc.m_function
   // member, and we could only get the line info for the function in question.
   std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());

lldb/source/Plugins/SymbolFile/PDB/SymbolFilePDB.cpp

for (int i = 0; i < entry_count; ++i) {
       // Before inserting the current entry, insert a terminal entry at the end
       // of the previous entry's address range if the current entry resulted in
       // a gap from the previous entry.
       if (is_gap && ShouldAddLine(match_line, prev_line, prev_length)) {
         line_table->AppendLineEntryToSequence(
             sequence.get(), prev_addr + prev_length, prev_line, 0,
             prev_source_idx, false, false, false, false, true);
 
-        line_table->InsertSequence(sequence.release());
+        line_table->InsertSequence(sequence.get());
         sequence = line_table->CreateLineSequenceContainer();
       }
 
       if (ShouldAddLine(match_line, lno, length)) {
         bool is_statement = line->isStatement();
         bool is_prologue = false;
         bool is_epilogue = false;
         auto func =