POLIO-2033: show unused vials in summary

[quang-le]

Related JIRA tickets : POLIO-2033

Self proofreading checklist

• [x] Did I use eslint and ruff formatters?
• [ ] Is my code clear enough and well documented?
• [ ] Are my typescript files well typed?
• [ ] New translations have been added or updated if new strings have been introduced in the frontend
• [ ] My migrations file are included
• [x] Are there enough tests?
• [ ] Documentation has been included (for new feature)

Doc

Tell us where the doc can be found (docs folder, wiki, in the code...).

Changes

• Display unused vials in summary
• update test

How to test

Go to any vaccine stock, check that the summary (up^per left) displays unused vials

Print screen / video