[scraperhelper] Make log scrapers emit log-related receiver telemetry (#14654)

#### Description

Log scrapers currently emit the same receiver telemetry as metric
scrapers, such as the `otelcol_receiver_accepted_metric_points` metric
(instead of `otelcol_receiver_accepted_log_records`), or spans named
`receiver/myreceiver/MetricsReceived` (instead of
`receiver/myreceiver/LogsReceived`). This PR fixes that.

#### Testing

I adjusted the test which checks the emitted traces.

Author: jade-guiton-dd

.chloggen/fix-logs-scraper-metric-name.yaml

@@ -0,0 +1,31 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: 'bug_fix'
+
+# The name of the component, or a single word describing the area of concern, (e.g. receiver/otlp)
+component: pkg/scraperhelper
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Log scrapers now emit log-appropriate receiver telemetry
+
+# One or more tracking issues or pull requests related to the change
+issues: [14654]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext: |
+  Log scrapers previously emitted the same receiver telemetry as metric scrapers,
+  such as the otelcol_receiver_accepted_metric_points metric (instead of otelcol_receiver_accepted_log_records),
+  or spans named receiver/myreceiver/MetricsReceived (instead of receiver/myreceiver/LogsReceived).
+
+  This did not affect scraper-specific spans and metrics.
+
+
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

scraper/scraperhelper/controller.go

@@ -153,9 +153,9 @@ func scrapeLogs(c *controller.Controller[scraper.Logs], nextConsumer consumer.Lo
 	}
 
 	logRecordCount := logs.LogRecordCount()
-	ctx = c.Obsrecv.StartMetricsOp(ctx)
+	ctx = c.Obsrecv.StartLogsOp(ctx)
 	err := nextConsumer.ConsumeLogs(ctx, logs)
-	c.Obsrecv.EndMetricsOp(ctx, "", logRecordCount, err)
+	c.Obsrecv.EndLogsOp(ctx, "", logRecordCount, err)
 }
 
 func scrapeMetrics(c *controller.Controller[scraper.Metrics], nextConsumer consumer.Metrics) {

scraper/scraperhelper/controller_test.go

@@ -181,7 +181,7 @@ func TestLogsScrapeController(t *testing.T) {
 				}
 
 				spans := tel.SpanRecorder.Ended()
-				assertReceiverSpan(t, spans)
+				assertLogsReceiverSpan(t, spans)
 				testhelper.AssertScraperSpan(t, test.scrapeErr, spans, "scraper/scraper/ScrapeLogs")
 				assertLogsScraperObsMetrics(t, tel, receiverID, component.MustNewID("scraper"), test.scrapeErr, sink)
 			}
@@ -292,7 +292,7 @@ func TestMetricsScrapeController(t *testing.T) {
 				}
 
 				spans := tel.SpanRecorder.Ended()
-				assertReceiverSpan(t, spans)
+				assertMetricsReceiverSpan(t, spans)
 				testhelper.AssertScraperSpan(t, test.scrapeErr, spans, "scraper/scraper/ScrapeMetrics")
 				assertMetricsScraperObsMetrics(t, tel, receiverID, component.MustNewID("scraper"), test.scrapeErr, sink)
 			}
@@ -378,7 +378,7 @@ func getExpectedShutdownErr(test scraperTestCase) error {
 	return errs
 }
 
-func assertReceiverSpan(t *testing.T, spans []sdktrace.ReadOnlySpan) {
+func assertMetricsReceiverSpan(t *testing.T, spans []sdktrace.ReadOnlySpan) {
 	receiverSpan := false
 	for _, span := range spans {
 		if span.Name() == "receiver/receiver/MetricsReceived" {
@@ -389,6 +389,17 @@ func assertReceiverSpan(t *testing.T, spans []sdktrace.ReadOnlySpan) {
 	assert.True(t, receiverSpan)
 }
 
+func assertLogsReceiverSpan(t *testing.T, spans []sdktrace.ReadOnlySpan) {
+	receiverSpan := false
+	for _, span := range spans {
+		if span.Name() == "receiver/receiver/LogsReceived" {
+			receiverSpan = true
+			break
+		}
+	}
+	assert.True(t, receiverSpan)
+}
+
 func assertLogsScraperObsMetrics(t *testing.T, tel *componenttest.Telemetry, receiver, scraper component.ID, expectedErr error, sink *consumertest.LogsSink) {
 	logRecordCounts := 0
 	for _, md := range sink.AllLogs() {