fix(snowflakes): create file lock files into lock directory

[Altahrim]

Summary

File locks are created outside of locks directory because of a missing /

Example: sfi_file_sequenceseq-009.lock instead of sfi_file_sequences/eq-009.lock

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)
• Labels added where applicable (ex: bug/enhancement, 3. to review, feature component)
• Milestone added for target branch/version (ex: 32.x for stable32)

[Altahrim]

/backport to stable33