fix: store Microsoft apt key as .asc instead of gpg --dearmor

Avoids 'gpg: dearmoring failed: File exists' error on ubuntu-24.04 runners
where the keyring file may already exist. Storing the ASCII-armored key
directly in /etc/apt/trusted.gpg.d/ is the simpler, more reliable approach.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: vkuttyp

.github/workflows/ci.yml

@@ -90,9 +90,8 @@ jobs:
       - name: Install sqlcmd
         run: |
           curl -fsSL https://packages.microsoft.com/keys/microsoft.asc \
-            | sudo gpg --batch --dearmor -o /usr/share/keyrings/microsoft-prod.gpg
-          echo "deb [arch=amd64 signed-by=/usr/share/keyrings/microsoft-prod.gpg] \
-            https://packages.microsoft.com/ubuntu/24.04/prod noble main" \
+            | sudo tee /etc/apt/trusted.gpg.d/microsoft.asc > /dev/null
+          echo "deb [arch=amd64] https://packages.microsoft.com/ubuntu/24.04/prod noble main" \
             | sudo tee /etc/apt/sources.list.d/mssql-release.list
           sudo apt-get update -q
           sudo ACCEPT_EULA=Y apt-get install -y sqlcmd