[compiler-rt][ASAN] Replace find_executable with shtuil.which in script

[DavidSpickett]

Summary

distutils is deprecated and shutil.which is the suggested
replacement for this function.

https://peps.python.org/pep-0632/#migration-advice
https://docs.python.org/3/library/shutil.html#shutil.which

which was added in 3.3 (https://docs.python.org/3/library/shutil.html#shutil.which)
and LLVM requires at least 3.6 (https://llvm.org/docs/GettingStarted.html#software).

[delcypher]

LGTM

compiler-rt/lib/asan/scripts/asan_symbolize.py

 """
 import argparse
 import bisect
 import errno
 import getopt
 import logging
 import os
 import re
+import shutil
 import subprocess
 import sys
-from distutils.spawn import find_executable
 
 symbolizers = {}
 demangle = False
 binutils_prefix = None
 fix_filename_patterns = None
 logfile = sys.stdin
 allow_system_symbolizer = True
 force_system_symbolizer = False
def __init__(self, binary):
     self.binary = binary
     self.pipe = self.open_addr2line()
     self.output_terminator = -1
 
   def open_addr2line(self):
     addr2line_tool = 'addr2line'
     if binutils_prefix:
       addr2line_tool = binutils_prefix + addr2line_tool
-    logging.debug('addr2line binary is %s' % find_executable(addr2line_tool))
+    logging.debug('addr2line binary is %s' % shutil.which(addr2line_tool))
     cmd = [addr2line_tool, '-fi']
     if demangle:
       cmd += ['--demangle']
     cmd += ['-e', self.binary]
     logging.debug(' '.join(cmd))
     return subprocess.Popen(cmd,
                             stdin=subprocess.PIPE, stdout=subprocess.PIPE,
                             bufsize=0,