Fix the problem where some Windows developers are unable to build project

[JohnNiang]

What type of PR is this?

/kind bug
/area core

What this PR does / why we need it:

Currently, some Windows developers using GBK as character encoding are unable to build project, please see #4771 for more.

Because the source code are using UTF-8 character encoding, the javadoc, compileJava, compileTestJava and delombok tasks will use the default character encoding GBK to handle the sources, which prevents the :api:javadoc task from running properly.

At the same time, we thank to @DaiYuANg for his first proposed solution in #4517.

Which issue(s) this PR fixes:

Fixes #4771

Special notes for your reviewer:

Validate the result by executing command ./gradlew clean build -x check on Windows environment.

Does this PR introduce a user-facing change?

修复在部分 Windows 开发者无法正常构建 Halo 的问题

[codecov]

Codecov Report

Merging #4844 (ae9115f) into main (4ea2014) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main    #4844   +/-   ##
=========================================
  Coverage     61.53%   61.53%           
  Complexity     2811     2811           
=========================================
  Files           406      406           
  Lines         14820    14820           
  Branches       1030     1030           
=========================================
  Hits           9119     9119           
  Misses         5205     5205           
  Partials        496      496           

[ruibaby]

/lgtm

[f2c-ci-robot]

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