[LLDB] Fix printing a static bool struct member when using "image lookup -t"

Fixes #58135

Somehow lldb was able to print the member on its own but when we try
to print the whole type found by "image lookup -t" lldb would crash.

This is because we'd encoded the initial value of the member as an integer.
Which isn't the end of the world because bool is integral for C++.
However, clang has a special AST node to handle literal bool and it
expected us to use that instead.

This adds a new codepath to handle static bool which uses cxxBoolLiteralExpr
and we get the member printed as you'd expect.

For testing I added a struct with just the bool because trying to print
all of "A" crashes as well. Presumably because one of the other member's
types isn't handled properly either.

So for now I just added the bool case, we can merge it with A later.

Reviewed By: aeubanks

Differential Revision: https://reviews.llvm.org/D135169