Add RBAC info to process and subscription detail endpoints

[kvklink]

This PR will allow to frontend to evaluate user permissions in order to disable certain input fields.

Related: workfloworchestrator/orchestrator-ui-library#2058

Closes: #955, #956

[codspeed-hq]

CodSpeed Performance Report

Merging #990 will not alter performance

_{Comparing 955-956-add-rbac-info-to-process-schema (8637d97) with main (e292549)}

Summary

✅ 12 untouched benchmarks

[codecov]

Codecov Report

Attention: Patch coverage is 75.86207% with 7 lines in your changes missing coverage. Please review.

Project coverage is 84.41%. Comparing base (e292549) to head (8637d97).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
orchestrator/graphql/schemas/process.py	54.54%	5 Missing ⚠️
orchestrator/api/api_v1/endpoints/subscriptions.py	85.71%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #990      +/-   ##
==========================================
+ Coverage   84.37%   84.41%   +0.03%     
==========================================
  Files         213      213              
  Lines       10289    10315      +26     
  Branches     1012     1016       +4     
==========================================
+ Hits         8681     8707      +26     
- Misses       1339     1340       +1     
+ Partials      269      268       -1     

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[Mark90]

Looks good, 1 comment and 1 nitpick!