Update sbt-sourcegraph and re-enable SBT build tool tests

[keynmol]

Now that we can run auto-indexing for SBT and support Scala 3, it's time to re-enable the tests

Test plan

• Re-enabled disabled tests
• Expanded testing matrix

[keynmol]

@olafurpg

Note that I have some changes locally to be able to run build tool tests in parallel, but it seems to suffer from a concurrency bug, where MUnit prints all suite names first and then all test results

FTR, the diff is

diff --git a/build.sbt b/build.sbt
index 4b2a864..52066b7 100644
--- a/build.sbt
+++ b/build.sbt
@@ -509,7 +509,8 @@ lazy val buildTools = project
       Map(
         "SCIP_JAVA_CLI" -> ((cli / pack).value / "bin" / "scip-java").toString
       ),
-    Test / fork := true
+    Test / fork := true,
+    Test / testForkedParallel := true
   )
   .dependsOn(agent, unit)
 
diff --git a/tests/buildTools/src/test/scala/tests/BaseBuildToolSuite.scala b/tests/buildTools/src/test/scala/tests/BaseBuildToolSuite.scala
index 80fe64a..d4401fb 100644
--- a/tests/buildTools/src/test/scala/tests/BaseBuildToolSuite.scala
+++ b/tests/buildTools/src/test/scala/tests/BaseBuildToolSuite.scala
@@ -21,6 +21,7 @@ import os.Shellable
 object Java8Only extends munit.Tag("Java8Only")
 
 abstract class BaseBuildToolSuite extends MopedSuite(ScipJava.app) {
+  self =>
   override def environmentVariables: Map[String, String] = sys.env
 
   def tags = List.empty[Tag]
@@ -49,8 +50,15 @@ abstract class BaseBuildToolSuite extends MopedSuite(ScipJava.app) {
   // NOTE(olafur): workaround for https://github.com/scalameta/moped/issues/18
   override val temporaryDirectory: DirectoryFixture =
     new DirectoryFixture {
-      private val path = BuildInfo.temporaryDirectory.toPath
-      override def apply(): Path = path
+      private val path = BuildInfo
+        .temporaryDirectory
+        .toPath
+        .resolve(self.getClass().getSimpleName())
+
+      override def apply(): Path = {
+        Files.createDirectories(path)
+        path
+      }
       override def beforeEach(context: BeforeEach): Unit = {
         DeleteVisitor.deleteRecursively(path)
       }

[olafurpg]

@keynmol what happens if you remove the -b option here? IIRC, MUnit supports using the sbt test logger, which groups by suite https://github.com/sourcegraph/scip-java/blob/main/build.sbt#L571

[keynmol]

That seems to have helped - I made buildTools the only module running in parallel

[keynmol]

Doing this so that individual suites don't clobber each other (otherwise you get issues with parallel folder deletion and all that).

Hacky but works for now.

[keynmol]

Ok, I made the tests sequential again on CI only - GHA workers have such tiny vCPUs and barely two of them, that it's not worth the increased GC overhead

[olafurpg]

We can probably get access to more powerful buildkite machines if we want to. I never looked into it.