Remove asan_symbolize.py for internal asan build (#8737)

Summary:
asan_symbolize.py is not compatible with python3. Also make it
consistent with public CI, which doesn't use asan_symbolize.py
And update coverage_test.sh to use python3.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8737

Test Plan: CI

Reviewed By: pdillinger

Differential Revision: D30702430

Pulled By: jay-zhuang

fbshipit-source-id: ef09947b1232294d31b09a855c2f0ce149097dd9

build_tools/rocksdb-lego-determinator

@@ -594,7 +594,7 @@ ASAN_TEST_COMMANDS="[
             $CLEANUP_ENV,
             {
                 'name':'Test RocksDB debug under ASAN',
-'shell':'cd $WORKING_DIR; set -o pipefail && ($SHM $ASAN $DEBUG $SKIP_FORMAT_CHECKS make $PARALLELISM asan_check || $CONTRUN_NAME=asan_check $TASK_CREATION_TOOL) |& /usr/facebook/ops/scripts/asan_symbolize.py -d',
+'shell':'cd $WORKING_DIR; set -o pipefail && $SHM $ASAN $DEBUG $SKIP_FORMAT_CHECKS make $PARALLELISM asan_check || $CONTRUN_NAME=asan_check $TASK_CREATION_TOOL',
                 'user':'root',
                 $PARSER
             }

coverage/coverage_test.sh

@@ -24,7 +24,7 @@ mkdir -p $COVERAGE_DIR
 
 # Find all gcno files to generate the coverage report
 
-PYTHON=${1:-`which python`}
+PYTHON=${1:-`which python3`}
 echo -e "Using $PYTHON"
 GCNO_FILES=`find $ROOT -name "*.gcno"`
 $GCOV --preserve-paths --relative-only --no-output $GCNO_FILES 2>/dev/null |