fix(setup): remove --retry-all-errors from manager repo file download

[fruch]

since this flag is only supported from curl 7.71.0 and up, we should yet be using it.

The warnings on this flag kind of make it a bit less helpful in our case, cause it can end up with multiple data in the output, and break our the repo definition.

Ref: https://curl.se/docs/manpage.html#--retry-all-errors

Testing

• artifact test

PR pre-checks (self review)

• I added the relevant backport labels
• I didn't leave commented-out/debugging code

Reminders

• Add New configuration option and document them (in sdcm/sct_config.py)
• Add unit tests to cover my changes (under unit-test/ folder)
• Update the Readme/doc folder relevant to this change (if needed)