Python: Enable Gradle build cache and Develocity test reporting for pytest (#6819)

Add output declarations, path sensitivity, and cacheIf to the pytestTest
task so it participates in the remote build cache. Register the JUnit XML
report with Develocity via ImportJUnitXmlReports so pytest results appear
in build scans.

Author: knutwannheden

rewrite-python/build.gradle.kts

@@ -1,5 +1,7 @@
 @file:Suppress("UnstableApiUsage")
 
+import com.gradle.develocity.agent.gradle.test.ImportJUnitXmlReports
+import com.gradle.develocity.agent.gradle.test.JUnitXmlDialect
 import nl.javadude.gradle.plugins.license.LicenseExtension
 import java.time.LocalDateTime
 import java.time.format.DateTimeFormatter
@@ -163,13 +165,21 @@ val pytestTest by tasks.registering(Exec::class) {
     dependsOn(pythonInstall)
 
     workingDir = pythonDir
-    commandLine(pythonExe.absolutePath, "-m", "pytest", "tests/", "-v")
+    commandLine(pythonExe.absolutePath, "-m", "pytest", "tests/", "-v",
+        "--junitxml=build/test-results/pytest/junit.xml")
 
     inputs.dir(pythonDir.resolve("src"))
+        .withPathSensitivity(PathSensitivity.RELATIVE)
     inputs.dir(pythonDir.resolve("tests"))
+        .withPathSensitivity(PathSensitivity.RELATIVE)
     inputs.file(pythonDir.resolve("pyproject.toml"))
+        .withPathSensitivity(PathSensitivity.RELATIVE)
+    outputs.file(pythonDir.resolve("build/test-results/pytest/junit.xml"))
+    outputs.cacheIf { true }
 }
 
+ImportJUnitXmlReports.register(tasks, pytestTest, JUnitXmlDialect.GENERIC)
+
 tasks.named("check") {
     dependsOn(testing.suites.named("py2CompatibilityTest"))
     dependsOn(pytestTest)