ci: update testrunner image (#15196)

## Description

Update the testrunner image used locally and in GitLab CI.

## Testing

<!-- Describe your testing strategy or note what tests are included -->

## Risks

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-->

## Additional Notes

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Author: brettlangdon

.gitlab/testrunner.yml

@@ -1,5 +1,5 @@
 variables:
-  TESTRUNNER_IMAGE: registry.ddbuild.io/dd-trace-py:v78900213-daaf5b5-testrunner@sha256:bf80b40852537c0eca2d8ace5ffeffa7b916bc4c412bf4a3fce2f9f8d72e7a20
+  TESTRUNNER_IMAGE: registry.ddbuild.io/dd-trace-py:v81799905-0f9bd8b-testrunner@sha256:f29e49e817cb3fdcc188414b9e94bd9244df7db00b72205738a752ab23953cc5
 
 .testrunner:
   image:

docker-compose.yml

@@ -185,7 +185,7 @@ services:
         # build:
         #  context: ./docker
         #  dockerfile: Dockerfile
-        image: ghcr.io/datadog/dd-trace-py/testrunner:adc7896c0901c0589e45776d9e409c3d1b15cd51@sha256:5fa1b0062e20c753cd5da590df3841b74b9ead5b4531a7ec9f5cacd2b95386e3
+        image: ghcr.io/datadog/dd-trace-py/testrunner:1717b70091ae646ec3ee29a5cb77158a82209aa3@sha256:aac6cacc68517874da310d5ea78a967f34af8388af5c6621aba77a73c4757657
         command: bash
         environment:
           DD_FAST_BUILD: "1"