Changes

Fix some misnamed variables in sve-fixed-length-int-minmax.ll.

[ADT] Add resize_for_overwrite method to SmallVector.

Analagous to the std::make_(unqiue|shared)_for_overwrite added in c++20.
If T is POD, and the container gets larger, any new values added wont be initialized.
This is useful when using SmallVector as a buffer where its planned to overwrite any potential new values added.
If T is not POD, `new (Storage) T` functions identically to `new (Storage) T()` so this will function identically to `resize(size_type)`.

Reviewed By: dexonsmith

Differential Revision: https://reviews.llvm.org/D93532

[tests] precommit a test mentioned in review for D93317

[LoopDeletion] Add test case where outer loop needs to be deleted.

In the test case @test1, the inner loop cannot be removed, because it
has a live-out value. But the outer loop is a no-op and can be removed.

[ADT] Fix some tests after 5d10b8ad

Some bots were failing due to signed/unsigned comparison.

[lldb] Add SBType::IsScopedEnumerationType method

Add a method to check if the type is a scoped enumeration (i.e. "enum
class/struct").

Differential revision: https://reviews.llvm.org/D93690

[lldb] Add SBType::GetEnumerationIntegerType method

Add a method for getting the enumeration underlying type.

Differential revision: https://reviews.llvm.org/D93696