llvm::is_contained is shorter than llvm::all_of plus a lambda.

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A few files of llvm dir had duplicate headers included. This patch
removes those redundancies.

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Co-authored-by: Akash Agrawal <akashag@qti.qualcomm.com>

When `llvm-extract`-ing a function, and the `CG Profile` flag is present in the original module, we end up with lots of `!{null, null, i64 1234}` entries for call edges that have disappeared as result of the removed functions.

This patch fixes that by adding a pass to `llvm-extract` that finds `CG Profile` edges with one or both operands `null` and removes them. This results in a cleaner output.

Identified with misc-include-cleaner.

startswith/endswith wrap starts_with/ends_with and will eventually go away (to more closely match string_view)

Compile units are not left explicitly if they have const global
expression.  They should be left if that const global is used in a
function that is contained in extracted module.

Signed-off-by: Mikhail Lychkov <mikhail.lychkov@intel.com>

Differential Revision: https://reviews.llvm.org/D131179

Mostly removing includes of InitializePasses.h and Pass.h in
passes that no longer has support for the legacy PM.