[AddressSanitizer] Refactor: Permit >1 interesting operands per instruction

Summary:
Refactor getInterestingMemoryOperands() so that information about the
pointer operand is returned through an array of structures instead of
passing each piece of information separately by-value.

This is in preparation for returning information about multiple pointer
operands from a single instruction.

A side effect is that, instead of repeatedly generating the same
information through isInterestingMemoryAccess(), it is now simply collected
once and then passed around; that's probably more efficient.

HWAddressSanitizer has a bunch of copypasted code from AddressSanitizer,
so these changes have to be duplicated.

This is patch 3/4 of a patch series:
https://reviews.llvm.org/D77616 [PATCH 1/4] [AddressSanitizer] Refactor ClDebug{Min,Max} handling
https://reviews.llvm.org/D77617 [PATCH 2/4] [AddressSanitizer] Split out memory intrinsic handling
https://reviews.llvm.org/D77618 [PATCH 3/4] [AddressSanitizer] Refactor: Permit >1 interesting operands per instruction
https://reviews.llvm.org/D77619 [PATCH 4/4] [AddressSanitizer] Instrument byval call arguments

[glider: renamed llvm::InterestingMemoryOperand::Type to OpType to fix
GCC compilation]

Reviewers: kcc, glider

Reviewed By: glider

Subscribers: hiraditya, jfb, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D77618