Google Cloud Functions documentation improvements

[loicmathieu]

No description provided.

[quarkus-bot]

Failing Jobs - Building 831bf89

Status	Name	Step	Failures	Logs	Raw logs
✔️	JVM Tests - JDK 11
✖	JVM Tests - JDK 11 Windows	Build	Failures	Logs	Raw logs
✖	JVM Tests - JDK 17	Build	Failures	Logs	Raw logs
✔️	JVM Tests - JDK 18
⌛	MicroProfile TCKs Tests	Verify	⚠️ Check →	Logs	Raw logs

Full information is available in the Build summary check run.

Failures

⚙️ JVM Tests - JDK 11 Windows #

- Failing: integration-tests/opentelemetry-vertx 

📦 integration-tests/opentelemetry-vertx

✖ io.quarkus.it.opentelemetry.vertx.HelloRouterTest.bus line 134 - More details - Source on GitHub

org.opentest4j.AssertionFailedError: expected: <CONSUMER> but was: <PRODUCER>
	at org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
	at org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)

---

⚙️ JVM Tests - JDK 17 #

- Failing: integration-tests/micrometer-prometheus 

📦 integration-tests/micrometer-prometheus

✖ io.quarkus.it.micrometer.prometheus.ClientRequestTest.testClientRequests line 36 - More details - Source on GitHub

java.lang.AssertionError: 
1 expectation failed.
Response body doesn't match expectation.

[loicmathieu]

Test failures seems un-related (micrometer and opentelemetry assertion failures).

[loicmathieu]

Can someone review this one please ? @gsmet or @geoand maybe ?
I have another PR which may be in conflict so I cannot finish it untill this one is merged.

[geoand]

Although this looks correct, I don't know the details of how the docs are built, so I'll leave it to Guillaume.

[loicmathieu]

I checked the generated docs for the correct replacement of attributes, but OK, let's wait for Guillaume

[loicmathieu]

@gsmet can you validate this PR ? I check the generated doc for the variable replacement this should be OK.

[gastaldi]

LGTM