LLVM/project f85579fcompiler-rt/lib/interception interception_win.cpp, compiler-rt/lib/interception/tests interception_win_test.cpp

[win/asan] GetInstructionSize: Fix `83 E4 XX` to return 3. (#119644)

This consolidates the two different lines for x86 and x86_64 into a
single line for both architectures.
And adds a test line.

CC: @zmodem
DeltaFile
+2-3compiler-rt/lib/interception/interception_win.cpp
+1-0compiler-rt/lib/interception/tests/interception_win_test.cpp
+3-32 files

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