Refactor deployment list page

[cakecatz]

What this PR does / why we need it:

• This refactoring will fix a bug that not refreshed deployment list

Which issue(s) this PR fixes:

Fixes #1178

Does this PR introduce a user-facing change?:

NONE

[khanhtc1202]

nit, sorry for the dumb question but I don't understand when do we need "idle" state 🤔

[cakecatz]

@khanhtc1202
idle is used to represent the state before fetching.

https://redux.js.org/tutorials/essentials/part-5-async-logic#loading-state-for-requests

It is not used currently, but it will be used in other modules/components.

[khanhtc1202]

ah, got it, thank you 🙏

[pipecd-bot]

Code coverage for golang is 34.27%. This pull request does not change code coverage.

[pipecd-bot]

Code coverage for javascript is 83.13%. This pull request does not change code coverage.

[khanhtc1202]

/lgtm

[pipecd-bot]

This pull request is APPROVED by nghialv.

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