docs: openapi 3.2.17 Create App And grant administrative privileges

[Anilople]

What's the purpose of this PR

Add document of openapi app creation.

Which issue(s) this PR fixes:

Fixes https://github.com/apolloconfig/apollo/pull/4954#issuecomment-1837380611

Brief changelog

3.2.17 Create App And grant administrative privileges

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• [x] Read the Contributing Guide before making this pull request.
• [ ] Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• [ ] Write necessary unit tests to verify the code.
• [ ] Run mvn clean test to make sure this pull request doesn't break anything.
• [ ] Update the CHANGES log.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (1cea083) 49.62% compared to head (60255f7) 49.66%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #5046 +/- ## ============================================ + Coverage 49.62% 49.66% +0.03% - Complexity 1904 1906 +2 ============================================ Files 372 372 Lines 11558 11558 Branches 1127 1127 ============================================ + Hits 5736 5740 +4 + Misses 5482 5478 -4 Partials 340 340 ```

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