ci: pin test runner [backport 2.1] (#7812)

Backport 5c3c3a2 from #7785 to 2.1.

Pin testrunner to this build:
https://github.com/DataDog/dd-trace-py/pkgs/container/dd-trace-py%2Ftestrunner/150490464?tag=253febbef2d235970f1c71ced77df6fe4fbeb449
[This PR](#7780) released a
new testrunner version
https://github.com/DataDog/dd-trace-py/actions/runs/7037182667/job/19151428689?pr=7780
and it affected to all branches

## Checklist

- [x] Change(s) are motivated and described in the PR description.
- [x] Testing strategy is described if automated tests are not included
in the PR.
- [x] Risk is outlined (performance impact, potential for breakage,
maintainability, etc).
- [x] Change is maintainable (easy to change, telemetry, documentation).
- [x] [Library release note
guidelines](https://ddtrace.readthedocs.io/en/stable/releasenotes.html)
are followed. If no release note is required, add label
`changelog/no-changelog`.
- [x] Documentation is included (in-code, generated user docs, [public
corp docs](https://github.com/DataDog/documentation/)).
- [x] Backport labels are set (if
[applicable](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting))

## Reviewer Checklist

- [x] Title is accurate.
- [x] No unnecessary changes are introduced.
- [x] Description motivates each change.
- [x] Avoids breaking
[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
changes unless absolutely necessary.
- [x] Testing strategy adequately addresses listed risk(s).
- [x] Change is maintainable (easy to change, telemetry, documentation).
- [x] Release note makes sense to a user of the library.
- [x] Reviewer has explicitly acknowledged and discussed the performance
implications of this PR as reported in the benchmarks PR comment.
- [x] 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)
- [x] If this PR touches code that signs or publishes builds or
packages, or handles credentials of any kind, I've requested a review
from `@DataDog/security-design-and-guidance`.
- [x] This PR doesn't touch any of that.

Co-authored-by: Alberto Vara <[email protected]>

Author: github-actions[bot]

.circleci/config.templ.yml

@@ -4,7 +4,7 @@ default_resource_class: &default_resource_class medium
 ubuntu_base_image: &ubuntu_base_img ubuntu-2004:2023.04.2
 cimg_base_image: &cimg_base_image cimg/base:2022.08
 python310_image: &python310_image cimg/python:3.10.12
-ddtrace_dev_image: &ddtrace_dev_image ghcr.io/datadog/dd-trace-py/testrunner@sha256:0ab20ba6e382770f520c4d5956cef5d4aa20623b8d43e58f77c100ee8ad903a0
+ddtrace_dev_image: &ddtrace_dev_image ghcr.io/datadog/dd-trace-py/testrunner@sha256:e1331dde65a56e8c6dc0516c84ef3525602bb36347d28526837e4bf21cdbf1a2
 redis_image: &redis_image redis:4.0-alpine@sha256:3e99741f293147ff406657dda7644c2b88564b80a498cd00da8f905743449c9f
 memcached_image: &memcached_image memcached:1.5-alpine@sha256:48cb7207e3d34871893fa1628f3a4984375153e9942facf82e25935b0a633c8a
 cassandra_image: &cassandra_image cassandra:3.11.7@sha256:495e5752526f7e75d3ad85b6a6bbf3b79714321b17a44255a216c341e3baae11

docker-compose.yml

@@ -151,7 +151,7 @@ services:
           - "127.0.0.1:5433:5433"
 
     testrunner:
-        image: ghcr.io/datadog/dd-trace-py/testrunner:latest
+        image: ghcr.io/datadog/dd-trace-py/testrunner:253febbef2d235970f1c71ced77df6fe4fbeb449
         command: bash
         environment:
             - TOX_SKIP_DIST=True