fix: remove redundant --registry flag from az acr import

When --source already contains the full registry hostname (e.g.
ecsdevacr.azurecr.io/image:tag), the --registry flag is redundant
and az acr import emits a WARNING that it will be ignored.

Drop --registry to eliminate the noise.

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

Author: BenjaminMichaelis

.github/workflows/Build-Test-And-Deploy.yml

@@ -189,7 +189,6 @@ jobs:
           az acr import \
             --name "${PROD_ACR%.azurecr.io}" \
             --source "${DEV_ACR}/essentialcsharpweb:${{ github.sha }}" \
-            --registry "${DEV_ACR%.azurecr.io}" \
             --image "essentialcsharpweb:${{ github.sha }}" \
             --image "essentialcsharpweb:latest" \
             --force