Fix regression_test.sh for LIB_MODE=shared default (#11194)

Summary:
Need to scp the .so files. Switched to tar+ssh to support symlinks, faster handling of multiple files, and compression.

Also fixing some holes in 'make clean' as I've noticed files like 'librocksdb.so.7.7.0', 'librocksdb_test_debug.so', 'librocksdb_tools_debug.so' hanging around after `make clean`

Pull Request resolved: https://github.com/facebook/rocksdb/pull/11194

Test Plan:
Manually triggered regression test runs with change, manual `make clean`
https://fburl.com/sandcastle/gnxy5lvc
https://fburl.com/sandcastle/4pxodwh7

Reviewed By: cbi42

Differential Revision: D43069065

Pulled By: pdillinger

fbshipit-source-id: 48552b5980956784a1fdb40638d9e8ad6db51900

Makefile

@@ -1217,9 +1217,9 @@ clean: clean-ext-libraries-all clean-rocks clean-rocksjava
 clean-not-downloaded: clean-ext-libraries-bin clean-rocks clean-not-downloaded-rocksjava
 
 clean-rocks:
-	echo shared=$(ALL_SHARED_LIBS)
+# Not practical to exactly match all versions/variants in naming (e.g. debug or not)
-	echo static=$(ALL_STATIC_LIBS)
+	rm -f ${LIBNAME}*.so* ${LIBNAME}*.a
-	rm -f $(BENCHMARKS) $(TOOLS) $(TESTS) $(PARALLEL_TEST) $(ALL_STATIC_LIBS) $(ALL_SHARED_LIBS) $(MICROBENCHS)
+	rm -f $(BENCHMARKS) $(TOOLS) $(TESTS) $(PARALLEL_TEST) $(MICROBENCHS)
 	rm -rf $(CLEAN_FILES) ios-x86 ios-arm scan_build_report
 	$(FIND) . -name "*.[oda]" -exec rm -f {} \;
 	$(FIND) . -type f \( -name "*.gcda" -o -name "*.gcno" \) -exec rm -f {} \;

tools/regression_test.sh

@@ -438,8 +438,9 @@ function setup_test_directory {
   run_remote "ls -l $DB_BENCH_DIR"
 
   if ! [ -z "$REMOTE_USER_AT_HOST" ]; then
-      run_local "$SCP ./db_bench $REMOTE_USER_AT_HOST:$DB_BENCH_DIR/db_bench"
+      shopt -s nullglob # allow missing librocksdb*.so* for static lib build
-      run_local "$SCP ./ldb $REMOTE_USER_AT_HOST:$DB_BENCH_DIR/ldb"
+      run_local "tar cz db_bench ldb librocksdb*.so* | $SSH $REMOTE_USER_AT_HOST 'cd $DB_BENCH_DIR/ && tar xzv'"
+      shopt -u nullglob
   fi
 
   run_local "mkdir -p $RESULT_PATH"