feat: prompt to upgrade theme when installing existing theme

[ruibaby]

What type of PR is this?

/kind feature
/area console
/milestone 2.6.x

What this PR does / why we need it:

支持在安装已存在主题时提示是否升级主题。

Which issue(s) this PR fixes:

Fixes #3969

Special notes for your reviewer:

测试方式：

1. 通过本地上传和远程下载的方式重复安装某个主题，观察是否可以正常提示升级以及测试升级是否正常。

Does this PR introduce a user-facing change?

Console 端支持安装已存在主题时提示升级主题。

[codecov]

Codecov Report

Merging #3970 (02f1cb5) into main (c22f158) will increase coverage by 0.09%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #3970      +/-   ##
============================================
+ Coverage     60.47%   60.57%   +0.09%     
- Complexity     2343     2347       +4     
============================================
  Files           355      355              
  Lines         12099    12099              
  Branches        873      873              
============================================
+ Hits           7317     7329      +12     
+ Misses         4350     4338      -12     
  Partials        432      432              

see 4 files with indirect coverage changes

[guqing]

/lgtm

[JohnNiang]

/lgtm

[f2c-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JohnNiang

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

The pull request process is described here

Needs approval from an approver in each of these files:

• console/OWNERS [JohnNiang]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment