[8.18](backport #46414) [Flaky test] metricbeat modules: increase integration test timeout to 2h (#46419)

* devtools: add GoTestArgs.Timeout and set module timeout to 2h (#46414)

The metricbeat module timeout build the docker image during the tests. For the kafka module, we use `docker.elastic.co/integrations-ci/beats-kafka` which downloads kafka during the image build process. It might take some time, much more than the default 10 min test timeout.
This change introduces a test timeout property to `GoTestArgs` and set it to 2h for the metricbeat module tests.

(cherry picked from commit c7a84ee)

# Conflicts:
#	dev-tools/mage/gotest.go

---------

Co-authored-by: Anderson Queiroz <[email protected]>

Author: mergify[bot]

dev-tools/mage/gotest.go

@@ -51,6 +51,7 @@ type GoTestArgs struct {
 	JUnitReportFile     string            // File to write a JUnit XML test report to.
 	CoverageProfileFile string            // Test coverage profile file (enables -cover).
 	Output              io.Writer         // Write stderr and stdout to Output if set
+	Timeout             string            // Timeout for tests (-timeout flag)
 }
 
 // TestBinaryArgs are the arguments used when building binary for testing.
@@ -176,6 +177,10 @@ func GoTestIntegrationArgsForPackage(pkg string) GoTestArgs {
 	args := makeGoTestArgsForPackage("Integration", pkg)
 
 	args.Tags = append(args.Tags, "integration")
+	// some test build docker images which download artifacts, and it can take a
+	// long time.
+	args.Timeout = "2h"
+
 	return args
 }
 
@@ -345,6 +350,9 @@ func GoTest(ctx context.Context, params GoTestArgs) error {
 			"-coverprofile="+params.CoverageProfileFile,
 		)
 	}
+	if params.Timeout != "" {
+		testArgs = append(testArgs, "-timeout="+params.Timeout)
+	}
 	testArgs = append(testArgs, params.ExtraFlags...)
 	testArgs = append(testArgs, params.Packages...)