PMM-12013 Fix scrapeconfig generation for rds exporter.

[BupycHuk]

PMM-12013

Link to the Feature Build: SUBMODULES-0

If this PR adds or removes or alters one or more API endpoints, please review and add or update the relevant API documents as well:

• API Docs updated

If this PR is related to some other PRs in this or other repositories, please provide links to those PRs:

• Links to related pull requests (optional).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.51%. Comparing base (8cb6278) to head (755d580).
Report is 1 commits behind head on v3.

Additional details and impacted files

@@            Coverage Diff             @@
##               v3    #3293      +/-   ##
==========================================
- Coverage   43.54%   43.51%   -0.04%     
==========================================
  Files         365      365              
  Lines       44150    44151       +1     
==========================================
- Hits        19226    19213      -13     
- Misses      23242    23256      +14     
  Partials     1682     1682              

Flag	Coverage Δ
admin	11.54% <ø> (+0.04%)	⬆️
agent	51.83% <ø> (-0.15%)	⬇️
managed	45.26% <100.00%> (+<0.01%)	⬆️
vmproxy	68.57% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.