docs: add required field documentation on management api

[ndr-brt]

What this PR changes/adds

Add required attribute where needed on the input schema objects for management api

Why it does that

documentation

Further notes

• 2 update methods were marked with a 200 status code but they are actually returning 204
• added @context objects as well, marked as required.
• remove flooding debug log

Linked Issue(s)

Closes #3552

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[codecov-commenter]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (6a85970) 72.46% compared to head (ff27175) 17.86%.
Report is 1 commits behind head on main.

❗ Current head ff27175 differs from pull request most recent head 35ec88a. Consider uploading reports for the commit 35ec88a to get more accurate results

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Additional details and impacted files

@@             Coverage Diff             @@
##             main    #3554       +/-   ##
===========================================
- Coverage   72.46%   17.86%   -54.61%     
===========================================
  Files         871      871               
  Lines       17424    17423        -1     
  Branches      993      993               
===========================================
- Hits        12627     3113     -9514     
- Misses       4381    14223     +9842     
+ Partials      416       87      -329     

Files	Coverage Δ
.../java/org/eclipse/edc/api/model/ApiCoreSchema.java	0.00% <ø> (ø)
...dc/connector/api/management/asset/v3/AssetApi.java	0.00% <ø> (ø)
...c/connector/api/management/catalog/CatalogApi.java	0.00% <ø> (ø)
...ment/contractdefinition/ContractDefinitionApi.java	0.00% <ø> (ø)
...nt/contractnegotiation/ContractNegotiationApi.java	0.00% <ø> (ø)
...tor/api/management/policy/PolicyDefinitionApi.java	0.00% <ø> (ø)
...management/transferprocess/TransferProcessApi.java	0.00% <ø> (ø)
...lector/api/v2/schemas/DataPlaneInstanceSchema.java	0.00% <0.00%> (ø)
...edc/vault/hashicorp/HashicorpVaultHealthCheck.java	0.00% <0.00%> (-86.85%)	⬇️

... and 568 files with indirect coverage changes

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