Backported fixes

• Refine infoDependsOnPrefix #18204
• Do not compute protoFormal if param.tpt is empty #18288
• Revert "Normalize match type usage during implicit lookup" #18440

Contributors

Thank you to all the contributors who made this release possible 🎉

According to git shortlog -sn --no-merges 3.3.1-RC5..3.3.1-RC6 these are:

     3	Paweł Marks
     2	Martin Odersky
     1	Nicolas Stucki