Backported chnages

• Fix generic signatures for inherited inner classes #26549
• Fix regression #26374: generic signatures of mixed-in trait setters #26542
• Fix regression #26550: revert isPrimitiveValueType change #26565
• Skip unresolved annotation trees (during TASTy loading) #26520

Contributors

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

According to git shortlog -sn --no-merges 3.9.0-RC3..3.9.0-RC4 these are:

     4  Rikito Taniguchi
     2  Wojciech Mazur