[lldb] Fix a use-after-free in SymbolFileCTF (#151586) This fixes a use-after-free in SymbolFileCTF. Previously, we would remove the underlying CTF type as soon as we resolved it. However, it's possible that we're still holding onto the CTF type while we're parsing a dependent type, like a modifier, resulting in a use-after-free. This patch addresses the issue by delaying the removal of the CTF type until the type is fully resolved. I have a XNU kernel binary that reproduces the issue and confirmed that this solves the memory issue using ASan. However I haven't been able to craft types by hand that reproduce this issue for a test case. rdar://156660866
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