Fix OpenAPI Specification structural error

[blueswen]

Comprehensive Summary of your change

The reference definition SchedulerStatus already has type: object, so remove the duplicated type: object under schema which cause the structural error.

Issue being fixed

Fixes #19781

Please indicate you've done the following:

• Well Written Title and Summary of the PR
• Label the PR as needed. "release-note/ignore-for-release, release-note/new-feature, release-note/update, release-note/enhancement, release-note/community, release-note/breaking-change, release-note/docs, release-note/infra, release-note/deprecation"
• Accepted the DCO. Commits without the DCO will delay acceptance.
• Made sure tests are passing and test coverage is added if needed.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed in website repository.

[chlins]

lgtm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e397e86) 67.54% compared to head (9ec7493) 67.55%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #19782   +/-   ##
=======================================
  Coverage   67.54%   67.55%           
=======================================
  Files         991      991           
  Lines      109167   109165    -2     
  Branches     2719     2719           
=======================================
+ Hits        73742    73746    +4     
+ Misses      31461    31453    -8     
- Partials     3964     3966    +2     

Flag	Coverage Δ
unittests	67.55% <ø> (+<0.01%)	⬆️

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see 5 files with indirect coverage changes

[wy65701436]

lgtm