fix yas patch not work

[SQxiaoxiaomeng]

// +kubebuilder:pruning:PreserveUnknownFields was missing leading to patch has been pruned

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line: /kind bug /kind documentation /kind enhancement /kind good-first-issue /kind feature /kind question /kind design /sig ai /sig iot /sig network /sig storage /sig storage

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #139

Special notes for your reviewer:

@kadisi @rambohe-ch

Does this PR introduce a user-facing change?

other Note

[openyurt-bot]

@SQxiaoxiaomeng: GitHub didn't allow me to assign the following users: your_reviewer.

Note that only openyurtio members, repo collaborators and people who have commented on this issue/PR can be assigned. Additionally, issues/PRs can only have 10 assignees at the same time. For more information please see the contributor guide

In response to [this](https://github.com/openyurtio/yurt-app-manager/pull/140): > > >`// +kubebuilder:pruning:PreserveUnknownFields` was missing leading to `patch` has been pruned >#### What type of PR is this? >> Uncomment only one ` /kind <>` line, hit enter to put that in a new line, and remove leading whitespace from that line: >> /kind bug >> /kind documentation >> /kind enhancement >> /kind good-first-issue >> /kind feature >> /kind question >> /kind design >> /sig ai >> /sig iot >> /sig network >> /sig storage >> /sig storage > > > >#### What this PR does / why we need it: > >#### Which issue(s) this PR fixes: > >Fixes #139 > >#### Special notes for your reviewer: > > > >#### Does this PR introduce a user-facing change? > >```release-note > >``` > >#### other Note > > Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[openyurt-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: SQxiaoxiaomeng To complete the pull request process, please assign rambohe-ch You can assign the PR to them by writing /assign @rambohe-ch in a comment when ready.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files: - **[OWNERS](https://github.com/openyurtio/yurt-app-manager/blob/master/OWNERS)** Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[openyurt-bot]

Welcome @SQxiaoxiaomeng! It looks like this is your first PR to openyurtio/yurt-app-manager 🎉

[codecov[bot]]

Codecov Report

Merging #140 (a5f916d) into master (d363b43) will increase coverage by 0.06%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #140      +/-   ##
==========================================
+ Coverage   45.14%   45.21%   +0.06%     
==========================================
  Files          42       42              
  Lines        4782     4782              
==========================================
+ Hits         2159     2162       +3     
+ Misses       2320     2318       -2     
+ Partials      303      302       -1     

Flag	Coverage Δ
unittests	45.21% <ø> (+0.06%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...manager/controller/nodepool/nodepool_controller.go	57.77% <0.00%> (+1.01%)	:arrow_up:

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[rambohe-ch]

@kadisi PTAL