[Loadtest] [Mgmt]Update shared_requirements.txt (Azure#25382)

* Update shared_requirements.txt

* Update shared_requirements.txt

Co-authored-by: Yuchao Yan <[email protected]>

Author: BigCat20196

shared_requirements.txt

@@ -227,6 +227,8 @@ opentelemetry-sdk<2.0.0,>=1.5.0,!=1.10a0
 #override azure-ai-language-conversations azure-core<2.0.0,>=1.24.0
 #override azure-mgmt-eventgrid msrest>=0.6.21
 #override azure-ai-language-conversations isodate<1.0.0,>=0.6.1
+#override azure-mgmt-loadtestservice azure-mgmt-core>=1.3.0,<2.0.0
+#override azure-mgmt-loadtestservice msrest>=0.6.21
 #override azure-mgmt-deviceupdate msrest>=0.6.21
 #override azure-mgmt-dataprotection msrest>=0.6.21
 #override azure-mgmt-chaos msrest>=0.6.21