ci: do not use datadog-ci binary [backport 2.17] (#11955)

Backport f483beb from #11789 to 2.17.

The datadog-ci binary is in beta and has known segfaults, this is
blocking our CI from completing successfully, even when gates do not
fail.

## Checklist
- [x] PR author has checked that all the criteria below are met
- The PR description includes an overview of the change
- The PR description articulates the motivation for the change
- The change includes tests OR the PR description describes a testing
strategy
- The PR description notes risks associated with the change, if any
- Newly-added code is easy to change
- The change follows the [library release note
guidelines](https://ddtrace.readthedocs.io/en/stable/releasenotes.html)
- The change includes or references documentation updates if necessary
- Backport labels are set (if
[applicable](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting))

## Reviewer Checklist
- [x] Reviewer has checked that all the criteria below are met 
- Title is accurate
- All changes are related to the pull request's stated goal
- Avoids breaking
[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
changes
- Testing strategy adequately addresses listed risks
- Newly-added code is easy to change
- Release note makes sense to a user of the library
- If necessary, author has acknowledged and discussed the performance
implications of this PR as reported in the benchmarks PR comment
- Backport labels are set in a manner that is consistent with the
[release branch maintenance
policy](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting)

Co-authored-by: Brett Langdon <brett.langdon@datadoghq.com>

.gitlab-ci.yml

@@ -90,12 +90,11 @@ check_new_flaky_tests:
   stage: quality-gate
   extends: .testrunner
   script:
-    - curl -L --fail "https://github.com/DataDog/datadog-ci/releases/latest/download/datadog-ci_linux-x64" --output "/usr/local/bin/datadog-ci" && chmod +x /usr/local/bin/datadog-ci
     - export DD_SITE=datadoghq.com
     - export DD_API_KEY=$(aws ssm get-parameter --region us-east-1 --name ci.${CI_PROJECT_NAME}.dd-api-key-qualitygate --with-decryption --query "Parameter.Value" --out text)
     - export DD_APP_KEY=$(aws ssm get-parameter --region us-east-1 --name ci.${CI_PROJECT_NAME}.dd-app-key-qualitygate --with-decryption --query "Parameter.Value" --out text)
     - datadog-ci gate evaluate
   except:
     - main
     - '[0-9].[0-9]*'
-    - 'mq-working-branch**'
+    - 'mq-working-branch**'