Increment expected function count in ESQL test (elastic#133853)

In f2b364c we added another function, which broke this test, which we fixed in elastic#133820.
We then immediately added another function in 97abc87, so let's fix this test again here.

Author: jordan-powers

muted-tests.yml

@@ -531,15 +531,6 @@ tests:
 - class: org.elasticsearch.xpack.esql.action.RandomizedTimeSeriesIT
   method: testGroupBySubset
   issue: https://github.com/elastic/elasticsearch/issues/133220
-- class: org.elasticsearch.xpack.esql.qa.single_node.EsqlClientYamlAsyncSubmitAndFetchIT
-  method: test {p0=esql/60_usage/Basic ESQL usage output (telemetry) non-snapshot version}
-  issue: https://github.com/elastic/elasticsearch/issues/133840
-- class: org.elasticsearch.xpack.esql.qa.single_node.EsqlClientYamlIT
-  method: test {p0=esql/60_usage/Basic ESQL usage output (telemetry) non-snapshot version}
-  issue: https://github.com/elastic/elasticsearch/issues/133841
-- class: org.elasticsearch.xpack.esql.qa.single_node.EsqlClientYamlAsyncIT
-  method: test {p0=esql/60_usage/Basic ESQL usage output (telemetry) non-snapshot version}
-  issue: https://github.com/elastic/elasticsearch/issues/133842
 - class: org.elasticsearch.cluster.routing.allocation.decider.WriteLoadConstraintDeciderIT
   method: testHighNodeWriteLoadPreventsNewShardAllocation
   issue: https://github.com/elastic/elasticsearch/issues/133857

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/esql/60_usage.yml

@@ -229,7 +229,7 @@ setup:
   - gt: {esql.functions.to_long: $functions_to_long}
   - match: {esql.functions.coalesce: $functions_coalesce}
   - gt: {esql.functions.categorize: $functions_categorize}
-  - length: {esql.functions: 141} # check the "sister" test above for a likely update to the same esql.functions length check
+  - length: {esql.functions: 142} # check the "sister" test above for a likely update to the same esql.functions length check
 
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 took: