kickstart: fix write_claim_config when executed as a regular user

[ilyam8]

Summary

Reported on Discord

Fixes

./kickstart.sh: 1278: cannot create /opt/netdata/etc/netdata/claim.conf.tmp: Permission denied
WARNING Failed to write claiming configuration. This usually means you do not have permissions to access the configuration directory.

This line is a problem

netdata/packaging/installer/kickstart.sh

Line 1278 in c4ad1e0

run_as_root echo "${config}" > "${claim_config}.tmp" || return 1

When you run a command with sudo, it runs with elevated privileges. However, the shell handles the redirection, which is still running with your regular user's privileges.

Test Plan

Additional Information

For users: How does this change affect me?