Fixes #8653

Problem

In PR #8621, I added a new keepTempDirectory parameter to ScriptedRun.run() and invoke() methods. To suppress MiMa warnings, I added mimaBinaryIssueFilters for:

• DirectMissingMethodProblem("sbt.ScriptedRun.run")
• DirectMissingMethodProblem("sbt.ScriptedRun.invoke")
• DirectMissingMethodProblem for various internal RunV1, RunV2, RunInParallelV1, RunInParallelV2 classes

However, this broke binary compatibility, which prevents sbt 1.x from calling sbt 2.x for cross-building (building sbt 2.x plugins using sbt 1.x).

Solution

Instead of using MiMa filters to suppress the warnings, this PR restores binary compatibility by:

1. Adding backward-compatible overloaded methods: Created overloaded run() and invoke() methods without the keepTempDirectory parameter that delegate to the new methods with keepTempDirectory=false

2. Removing problematic MiMa filters: Removed all DirectMissingMethodProblem filters for ScriptedRun methods

3. Keeping acceptable filter: Retained only ReversedMissingMethodProblem("sbt.ScriptedRun.invoke") filter, which is acceptable since the old method signatures are preserved

4. Code cleanup: Removed unused @unused import

Changes

main/src/main/scala/sbt/ScriptedRun.scala

• Added overloaded run() method without keepTempDirectory parameter (delegates to new method with false)
• Added overloaded invoke() method without keepTempDirectory parameter (delegates to new method with false)
• Removed @unused import (no longer needed)
• Removed @unused annotations from internal class methods

build.sbt

• Removed MiMa filters for DirectMissingMethodProblem on ScriptedRun methods
• Kept ReversedMissingMethodProblem("sbt.ScriptedRun.invoke") filter

Testing

• ✅ Compiles successfully
• ✅ mainProj/mimaReportBinaryIssues passes
• ✅ Binary compatibility maintained for cross-building

Checklist

• Compiles successfully
• Binary compatibility verified with MiMa
• Backward-compatible method signatures preserved
• New functionality still works with keepTempDirectory parameter