fix payload and logging for CI analytics data

[alexrashed]

Motivation

This PR addresses two issues in sending the Tinybird analytics data introduced in #10492:

• There is an issue with the log output, f.e. in the output of this run:

  cat: stats/stats.json: No such file or directory
  

  However, this really only impacts the debug info on what data will be sent in the step right below.
  Sending the data is not affected at all.
• There is no workflow name being set in the payload (because the variable is not properly set).

Changes

• Fix a small reporting issue in the Tinybird CI analytics sending.
• Fix the workflow name in the payload.

Testing

• See in the triggered run that the output of the data to be sent works correctly now.
  • https://app.circleci.com/pipelines/github/localstack/localstack/23560/workflows/fc6afc38-bd09-4a89-9fbe-5ede283a149a

TODO

• Revert the last commit removing the branch filter for testing.
• Check the result of the test run: https://app.circleci.com/pipelines/github/localstack/localstack/23560/workflows/fc6afc38-bd09-4a89-9fbe-5ede283a149a

[github-actions]

LocalStack Community integration with Pro

    2 files  ±0      2 suites  ±0   1h 29m 51s ⏱️ + 1m 31s
2 707 tests ±0  2 452 ✅ ±0  255 💤 ±0  0 ❌ ±0 
2 709 runs  ±0  2 452 ✅ ±0  257 💤 ±0  0 ❌ ±0 

Results for commit 82197b3. ± Comparison against base commit 5068678.

♻️ This comment has been updated with latest results.

[silv-io]

LGTM! Just some small suggestions/nits