tools: make isort and black formatters to work together

Config multi line output to mode 3, so isort and black can agree with
each other:
```
3 - Vertical Hanging Indent

from third_party import (
    lib1,
    lib2,
    lib3,
    lib4,
)
```

Signed-off-by: xuxingliang <xuxingliang@xiaomi.com>

.github/linters/setup.cfg

@@ -2,6 +2,7 @@
 ignore = W503,W605,E203
 max-complexity = 27
 max-line-length = 125
+multi_line_output=3
 show-source = True
 statistics = True
 

tools/checkpatch.sh

@@ -85,7 +85,7 @@ check_file() {
   if [ ${@##*.} == 'py' ]; then
     black --check $@ || fail=1
     flake8 --config ${TOOLDIR}/../.github/linters/setup.cfg $@ || fail=1
-    isort $@ || fail=1
+    isort --settings-path ${TOOLDIR}/../.github/linters/setup.cfg $@ || fail=1
   elif [ "$(is_rust_file $@)" == "1" ]; then
     if ! command -v rustfmt &> /dev/null; then
       fail=1