feat: add Parse Server config to standard request object

[Moumouls]

New Pull Request Checklist

• I am not disclosing a vulnerability.
• I am creating this PR in reference to an issue.

Issue Description

Related issue: #7869

Approach

Forward the Parse Server Config through the standard request object available in all Parse Cloud functions/triggers.

TODOs before merging

• Add tests
• Add changes to documentation (guides, repository pages, in-code descriptions)
• Add security check
• A changelog entry is created automatically using the pull request title (do not manually add a changelog entry)

[parse-github-assistant]

Thanks for opening this pull request!

• 🎉 We are excited about your hands-on contribution!

[codecov]

Codecov Report

Merging #8069 (56d6516) into alpha (42c9543) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##            alpha    #8069      +/-   ##
==========================================
- Coverage   94.14%   94.14%   -0.01%     
==========================================
  Files         182      182              
  Lines       13691    13692       +1     
==========================================
  Hits        12890    12890              
- Misses        801      802       +1     

Impacted Files	Coverage Δ
src/Routers/FunctionsRouter.js	94.11% <ø> (ø)
src/cloud-code/Parse.Cloud.js	99.20% <ø> (ø)
src/triggers.js	95.34% <ø> (ø)
src/Controllers/HooksController.js	94.73% <100.00%> (+0.04%)	⬆️
src/batch.js	92.98% <0.00%> (-1.76%)	⬇️
src/RestWrite.js	94.42% <0.00%> (-0.16%)	⬇️
src/ParseServerRESTController.js	98.48% <0.00%> (+1.51%)	⬆️

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[mtrezza]

See #7869 (comment)

[Moumouls]

lets close this one since @dblythy implemented the singleton strategy