compat-matrix: pass Vertex AI + Azure Foundry creds to PR-gate proxy and stop logging api_key

The Claude Code Compatibility Matrix PR gate booted the proxy with only
Anthropic + Bedrock credentials, so every Vertex AI and Azure cell (12
out of 30) failed at startup because test_config.yaml resolves
VERTEXAI_CREDENTIALS, AZURE_FOUNDRY_API_KEY, and AZURE_FOUNDRY_API_BASE
from the environment. Forward those three env vars from the CircleCI
context so the proxy has working routes for all five providers.

Also drop the leftover debug prints in
basic_messaging_non_streaming/test_anthropic.py that wrote the proxy
api_key to stdout (and from there to JUnit XML / CI logs).

.circleci/config.yml

@@ -2068,6 +2068,9 @@ jobs:
               -e AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID \
               -e AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY \
               -e AWS_REGION_NAME="us-east-1" \
+              -e VERTEXAI_CREDENTIALS=$VERTEXAI_CREDENTIALS \
+              -e AZURE_FOUNDRY_API_KEY=$AZURE_FOUNDRY_API_KEY \
+              -e AZURE_FOUNDRY_API_BASE=$AZURE_FOUNDRY_API_BASE \
               -e LITELLM_LOCAL_ANTHROPIC_BETA_HEADERS="True" \
               --add-host host.docker.internal:host-gateway \
               --name compat-proxy \

tests/claude_code/basic_messaging_non_streaming/test_anthropic.py

@@ -63,9 +63,6 @@ def test_basic_messaging_non_streaming_anthropic(compat_result, model):
             f"{PROXY_BASE_URL_ENV} / {PROXY_API_KEY_ENV} not configured", pytrace=False
         )
 
-    print(f"base_url: {base_url}")
-    print(f"api_key: {api_key}")
-
     try:
         result = run_claude(
             prompt="Reply with the single word 'pong' and nothing else.",