[ci] Run cronjob with app secrets

[alvicsam]

PR adds app tokens so the job "Upload artifacts" has running CI in the PR it creates.

cc https://github.com/paritytech/ci_cd/issues/928
cc @tadeohepperle @pavelsupr

[jsdw]

I turned this into a draft since it looks like it's in progress; please turn back to proper PR once it's ready for us to look at (I'm not sure the exact goals/reason for this change atm!) :)

[alvicsam]

@jsdw thanks! I updated PR description

@tadeohepperle the credentials work but now the action fails because of the error:

remote: error: Trace: 7feebb3939405d32c7ba980df6692009a70fa25f7beea09036fe2722b667b968        
remote: error: See https://gh.io/lfs for more information.        
remote: error: File polkadot is 123.89 MB; this exceeds GitHub's file size limit of 100.00 MB        
remote: error: GH001: Large files detected. You may want to try Git Large File Storage - https://git-lfs.github.com./

[lexnv]

This looks good to me! Thanks for the help here!
I would probably also strip the binary, similarly to what Niklas suggested.

What would be the next step to get this merged? 🤔

[jsdw]

Looks good, nice one!

I guess we can compress the other two polkadot binaries if we feel the need as well, but if it works at the mo then all good :)