Upgrade to Spring Boot 3.4.0-M3

[JohnNiang]

What type of PR is this?

/kind cleanup
/area core
/milestone 2.20.x

What this PR does / why we need it:

This PR upgrades to Spring Boot 3.4.0-M3.

1. Fix the compilation error of OptimalPropertyAccess because the class has been privated in this commit.
2. Fix exception org.mockito.exceptions.misusing.UnnecessaryStubbingException for some unit tests after upgrading.
3. Replace deprecated annotations @MockBean and @SpyBean with @MockitoBean and @MockitoSpyBean respectively.

Does this PR introduce a user-facing change?

升级 Spring Boot 至 3.4.0-M3

[JohnNiang]

Wait for #6686 to be merged.

[guqing]

编译没过 需要修复一下

[JohnNiang]

编译没过 需要修复一下

编译错误和单元测试错误已经修复。

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 58.18%. Comparing base (6cd8dc8) to head (8afab2e).
Report is 84 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##               main    #6687     +/-   ##
===========================================
  Coverage     58.18%   58.18%             
- Complexity     3774     3944    +170     
===========================================
  Files           651      679     +28     
  Lines         22125    23216   +1091     
  Branches       1538     1582     +44     
===========================================
+ Hits          12873    13508    +635     
- Misses         8641     9084    +443     
- Partials        611      624     +13     

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[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[JohnNiang]

/ping @halo-dev/sig-halo

[guqing]

/lgtm

[f2c-ci-robot]

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