CI: create GitHub Action to detect soon to expire release signing PGP keys #6281
Description
We should detect release signing PGP keys that are about to expire soon and either remove or update them.
A script should be able to detect that, some inspiration can be found here:
#6272 (comment)
For example, the following keys will expire this year:
9FC6B0BFD597A94DBF09708280E5375C094198D8 @bhandras
7E81EF6B9989A9CC93884803118759E83439A9B1 @Crypt-iQ
EB13A98091E8D67CDD7FC5A7E9FE7FE00AD163A4 @positiveblue
E97A1AB6C77A1D2B72F50A6F90E00CCB1C74C611 @arshbot