fix(interactive): Add requests in test-requirements (#4434)

- Resolve the CI issue:
https://github.com/alibaba/GraphScope/actions/runs/12862048341/job/35856903879
- Use an elder version of mimalloc.

Author: zhanglei1949

flex/interactive/sdk/python/test-requirements.txt

@@ -1,3 +1,4 @@
 pytest~=7.1.3
 pytest-cov>=2.8.1
 pytest-randomly>=3.12.0
+requests>=2.32.3

python/graphscope/gsctl/scripts/install_deps.sh

@@ -489,7 +489,7 @@ install_zlib() {
 
 install_mimalloc() {
   pushd "${tempdir}" || exit
-  git clone https://github.com/microsoft/mimalloc -b v1.8.9
+  git clone https://github.com/microsoft/mimalloc -b v1.8.6
   cd mimalloc
   mkdir -p build && cd build
   cmake .. -DCMAKE_BUILD_TYPE=Release \