Use ci_tools.txt in init.sh (Azure#42654)

* use ci_tools in init

* output to dev/null

* new line

Author: JennyPng

.devcontainer/init.sh

@@ -31,7 +31,5 @@ sudo apt-get install -y powershell
 # init env
 python -m pip install -U pip > /dev/null
 python scripts/dev_setup.py -p azure-core > /dev/null
-pip install tox==4.15.0 > /dev/null
-pip install wheel==0.43.0 > /dev/null
-pip install setuptools==78.1.0 > /dev/null
-pip install setuptools-scm==8.3.0 > /dev/null
+pip install -r eng/ci_tools.txt > /dev/null
+