Reduce fields returned by notice cves

[samhotep]

Done

• Created an optional parameter reduce_cves to reduce the number of CVE fields returned on notices.cves
• The rationale here is to reduce the size of the notices.json payload which can be over 250MB

QA

• Check out this feature branch
• Run the site using the command ./run serve
• View the site locally in your web browser at: http://0.0.0.0:8030/
• Run through the following QA steps

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 93.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 86.40%. Comparing base (d1eb6b7) to head (0bf6693). Report is 24 commits behind head on main.

:exclamation: Current head 0bf6693 differs from pull request most recent head 979774b

Please upload reports for the commit 979774b to get more accurate results.

Files	Patch %	Lines
webapp/views.py	90.90%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #155 +/- ## ========================================== + Coverage 85.84% 86.40% +0.56% ========================================== Files 30 30 Lines 1582 1640 +58 ========================================== + Hits 1358 1417 +59 + Misses 224 223 -1 ``` | [Flag](https://app.codecov.io/gh/canonical/ubuntu-com-security-api/pull/155/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=canonical) | Coverage Δ | | |---|---|---| | [python](https://app.codecov.io/gh/canonical/ubuntu-com-security-api/pull/155/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=canonical) | `86.40% <93.33%> (+0.56%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=canonical#carryforward-flags-in-the-pull-request-comment) to find out more.

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