feat: log projects quotas comparison, fix: source server keypair - control flow

fix: source server keypair - control flow

• Break up into 2 functions, simplify control flow, fix asserts, remove unused functions.

feat: log projects quotas comparison

• Log quotas comparison of source and destination project.
• Output a separate log line for each quota based on comparison result:
  • info if src_quota == dst_quota
  • warn if src_quota < dst_quota
  • error if src_quota > dst_quota
• Compare only a predefined set of quotas.
• See https://gitlab.ics.muni.cz/cloud/internal-wiki/-/issues/1656.