Fix: Set default values for traits in VelaUX

[am6737]

• Addressed the issue where default values for traits (including "cpuscaler", "hpa", "resource", "k8s-update-strategy") were not being set properly.

Description of your changes

Fixes #650

I have:

• [x] Read and followed KubeVela's contribution process.
• [ ] Related Docs updated properly. In a new feature or configuration option, an update to the documentation is necessary.
• [x] Run yarn lint to ensure the frontend changes are ready for review.
• [ ] Run make reviewableto ensure the server changes are ready for review.
• [ ] Added backport release-x.y labels to auto-backport this PR if necessary.

Special notes for your reviewer

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 51.08%. Comparing base (2ab672c) to head (0ee5c80). Report is 6 commits behind head on main.

:exclamation: There is a different number of reports uploaded between BASE (2ab672c) and HEAD (0ee5c80). Click for more details.

HEAD has 2 uploads less than BASE

| Flag | BASE (2ab672c) | HEAD (0ee5c80) | |------|------|------| |apiserver-unittests|1|0| |server-e2e-tests|2|1|

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #913 +/- ## ========================================== - Coverage 59.01% 51.08% -7.94% ========================================== Files 116 116 Lines 19846 16511 -3335 ========================================== - Hits 11713 8435 -3278 - Misses 6696 6833 +137 + Partials 1437 1243 -194 ``` | [Flag](https://app.codecov.io/gh/kubevela/velaux/pull/913/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=kubevela) | Coverage Δ | | |---|---|---| | [apiserver-unittests](https://app.codecov.io/gh/kubevela/velaux/pull/913/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=kubevela) | `?` | | | [server-e2e-tests](https://app.codecov.io/gh/kubevela/velaux/pull/913/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=kubevela) | `51.08% <ø> (+2.77%)` | :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=kubevela#carryforward-flags-in-the-pull-request-comment) to find out more.

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