fix: increase start delay for ASGI conformance tests to address flaky failures

The ASGI conformance tests are failing sporadically with connection refused errors,
where the server appears to not be ready when the test client attempts to connect.

Hypothesis: The default 1-second start delay may be insufficient for Uvicorn/ASGI
server startup in CI environments. This change increases startDelay to 5 seconds
to match the buildpack integration tests, which have been running reliably.

This is an attempt to diagnose and fix the intermittent failures - further
investigation may be needed if the issue persists.

Author: taeold

.github/workflows/conformance-asgi.yml

@@ -54,6 +54,7 @@ jobs:
         useBuildpacks: false
         validateMapping: false
         cmd: "'functions-framework --source tests/conformance/async_main.py --target write_http --signature-type http --asgi'"
+        startDelay: 5
 
     - name: Run CloudEvents conformance tests
       uses: GoogleCloudPlatform/functions-framework-conformance/action@72a4f36b10f1c6435ab1a86a9ea24bda464cc262 # v1.8.6
@@ -62,6 +63,7 @@ jobs:
         useBuildpacks: false
         validateMapping: false
         cmd: "'functions-framework --source tests/conformance/async_main.py --target write_cloud_event --signature-type cloudevent --asgi'"
+        startDelay: 5
 
     - name: Run HTTP conformance tests declarative
       uses: GoogleCloudPlatform/functions-framework-conformance/action@72a4f36b10f1c6435ab1a86a9ea24bda464cc262 # v1.8.6
@@ -70,6 +72,7 @@ jobs:
         useBuildpacks: false
         validateMapping: false
         cmd: "'functions-framework --source tests/conformance/async_main.py --target write_http_declarative --asgi'"
+        startDelay: 5
 
     - name: Run CloudEvents conformance tests declarative
       uses: GoogleCloudPlatform/functions-framework-conformance/action@72a4f36b10f1c6435ab1a86a9ea24bda464cc262 # v1.8.6
@@ -78,6 +81,7 @@ jobs:
         useBuildpacks: false
         validateMapping: false
         cmd: "'functions-framework --source tests/conformance/async_main.py --target write_cloud_event_declarative --asgi'"
+        startDelay: 5
 
     - name: Run HTTP concurrency tests declarative
       uses: GoogleCloudPlatform/functions-framework-conformance/action@72a4f36b10f1c6435ab1a86a9ea24bda464cc262 # v1.8.6
@@ -86,6 +90,7 @@ jobs:
         useBuildpacks: false
         validateConcurrency: true
         cmd: "'functions-framework --source tests/conformance/async_main.py --target write_http_declarative_concurrent --asgi'"
+        startDelay: 5
 
     # Note: Event (legacy) and Typed tests are not supported in ASGI mode
     # Note: validateMapping is set to false for CloudEvent tests because ASGI mode