Fixing issues with HTTP request forwarding and adding retries

[fabiocav]

Resolves #9954

This PR fixes a few issues identified while investigating support cases and internal reports.

• Addresses a potential race with worker initialization, primarily handled by a retry
• Ensures the forwarding task is evaluated in failed execution scenarios
• Ensures any exceptions captured by the forwarder are thrown/logged, so we have information about underlying failures
• Refactored code in the invocation handling to simplify the method
• A few performance optimizations in that hot path

Pull request checklist

• My changes do not require documentation changes
  • Otherwise: Documentation issue linked to PR
• My changes should not be added to the release notes for the next release
  • Otherwise: I've added my notes to release_notes.md
• My changes do not need to be backported to a previous version
  • Otherwise: Backport tracked by issue/PR #issue_or_pr
• My changes do not require diagnostic events changes
  • Otherwise: I have added/updated all related diagnostic events and their documentation (Documentation issue linked to PR)
• I have added all required tests (Unit tests, E2E tests)

[kshyju]

release notes update missing.