Fixes #8576

Problem

Currently testOnly supports glob expressions like **:

testOnly **.SomethingTest

However, ** is inconvenient from Bash because Bash itself expands the glob expression, requiring users to quote the pattern.

Solution

Support ... as an alias for ** by substituting ... with ** before applying the glob filter. This allows users to write:

$ sbt --client testOnly ...SomethingTest

Changes

• IncrementalTest.scala: Added expandGlob function that replaces ... with **, applied to both include and exclude patterns in selectedFilter
• Defaults.scala: Applied expandGlob in distinctParser for tab completion matching

Testing

• Added unit tests in SelectedFilterTest.scala for expandGlob and ... pattern matching
• Added scripted test cases in tests/test-exclude for end-to-end verification

Checklist

• Compiles successfully
• scalafmtCheckAll passes
• Tests added (unit + scripted)