ci: use testrunner-2025.08.08 (#14265)

Follows #14248 and
DataDog/images#7477

Also adds parallelism to `azure_functions` tests since they were
finishing right around the 20 minute timeout following the upgrade of
`azure-functions-core-tools.

## 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
- [ ] 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)

Author: duncanpharvey

.github/workflows/requirements-locks.yml

@@ -12,7 +12,7 @@ jobs:
     name: Check requirements lockfiles
     runs-on: ubuntu-latest
     container:
-      image: ghcr.io/datadog/dd-trace-py/testrunner:ae4c189ebf8e539f39905f21c7918cc19de69d13@sha256:9476c426c677d39a58c170ed3167e4d630ed4f067a8a2be2fb96d843795d2ac2
+      image: ghcr.io/datadog/dd-trace-py/testrunner:280be7679757b720503a284a69da36995b6ef48d@sha256:68865857c710d5703ddf9190ff33eb1ea47974e8332d04e2e115ef3b52513def
       options: "--user 0"
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

.gitlab/testrunner.yml

@@ -1,5 +1,5 @@
 variables:
-  TESTRUNNER_IMAGE: registry.ddbuild.io/dd-trace-py:v72171907-b7ecc7e-testrunner-2025.07.29@sha256:0951475f34dad2b2eed3f30f79895676dd6fb9c1ae2563c93729942ebbb269aa
+  TESTRUNNER_IMAGE: registry.ddbuild.io/dd-trace-py:v73166438-4077fc2-testrunner-2025.08.08@sha256:456e32d2fdc19569fb34d705d1ccf193c179cc5364d1f93e60f825d189647c3d
 
 .testrunner:
   image:

docker-compose.yml

@@ -174,7 +174,7 @@ services:
         # build:
         #  context: ./docker
         #  dockerfile: Dockerfile
-        image: ghcr.io/datadog/dd-trace-py/testrunner:ae4c189ebf8e539f39905f21c7918cc19de69d13@sha256:9476c426c677d39a58c170ed3167e4d630ed4f067a8a2be2fb96d843795d2ac2
+        image: ghcr.io/datadog/dd-trace-py/testrunner:280be7679757b720503a284a69da36995b6ef48d@sha256:68865857c710d5703ddf9190ff33eb1ea47974e8332d04e2e115ef3b52513def
         command: bash
         environment:
           DD_FAST_BUILD: "1"

tests/contrib/suitespec.yml

@@ -349,7 +349,7 @@ suites:
     runner: riot
     snapshot: true
   azure_functions:
-    parallelism: 1
+    parallelism: 2
     paths:
       - '@bootstrap'
       - '@core'