Update MSSQL smoke test (#2792)

This PR removes the SA_PASSWORD hard coded environment variable from the MSSQL smoke test. Instead, a password for the SQL server is set as a repository secret.

Author: bachuv

.github/workflows/smoketest-mssql-inproc-v4.yml

@@ -7,18 +7,20 @@ on:
     paths:
       - 'src/**'
       - 'test/SmokeTests/BackendSmokeTests/MSSQL/**'
+      - '.github/workflows/smoketest-mssql-inproc-v4.yml'
   pull_request:
     branches: [ main, dev ]
     paths:
       - 'src/**'
       - 'test/SmokeTests/BackendSmokeTests/MSSQL/**'
+      - '.github/workflows/smoketest-mssql-inproc-v4.yml'
 
 jobs:
   build:
 
     runs-on: ubuntu-latest
     env:
-      SA_PASSWORD: NotASecret!12
+      SA_PASSWORD: ${{ secrets.SA_PASSWORD }}
 
     steps:
     - uses: actions/checkout@v4