[test] Fix venv version installed on Fedora 26 (#34477)

tools/bazelify_tests/dockerimage_current_versions.bzl

@@ -46,7 +46,7 @@ DOCKERIMAGE_CURRENT_VERSIONS = {
     "tools/dockerfile/distribtest/python_dev_buster_x64.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/python_dev_buster_x64@sha256:e30d6efdeac24e5136cc169d503a239df22147bfb121d27feb1f87d58a8fe64e",
     "tools/dockerfile/distribtest/python_dev_buster_x86.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/python_dev_buster_x86@sha256:179146fd5d5cc15846c6bf0284c2e261f383caf944559d2d9f7a5af0e0f7152d",
     "tools/dockerfile/distribtest/python_dev_centos7_x64.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/python_dev_centos7_x64@sha256:e6e9a1b23a0a543050db91e17d621aa899bad04308adaf961c11fa88ba941a95",
-    "tools/dockerfile/distribtest/python_dev_fedora36_x64.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/python_dev_fedora36_x64@sha256:0a4b7da21e779b9aeb76e32c0c98d5f0f2bcaa1b0c2b61a98e152475b7067372",
+    "tools/dockerfile/distribtest/python_dev_fedora36_x64.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/python_dev_fedora36_x64@sha256:d10ea0c54ecaa861b67942b4adc69178585cd071c9d0c8997fa274a362beea55",
     "tools/dockerfile/distribtest/python_dev_ubuntu1604_x64.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/python_dev_ubuntu1604_x64@sha256:167134c3a43e7d2608c893cc98a5066eae93c6af97ef5a1e69d643cbc7fefc43",
     "tools/dockerfile/distribtest/python_dev_ubuntu1804_x64.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/python_dev_ubuntu1804_x64@sha256:157a89cd6d0e69b89ac1975e0314aade556a35aafbaa5fe9f9890f90321d6c89",
     "tools/dockerfile/distribtest/python_dev_ubuntu2004_x64.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/python_dev_ubuntu2004_x64@sha256:91f0d88c43ec52ecd63f99acb424c88ff9a67fa046fae207a75e99bee37eef11",

tools/dockerfile/distribtest/python_dev_fedora36_x64.current_version

@@ -1 +1 @@
-us-docker.pkg.dev/grpc-testing/testing-images-public/python_dev_fedora36_x64:9d15cd0e55a54e7e7c50c851953fa2c22ee25b1b@sha256:0a4b7da21e779b9aeb76e32c0c98d5f0f2bcaa1b0c2b61a98e152475b7067372
+us-docker.pkg.dev/grpc-testing/testing-images-public/python_dev_fedora36_x64:b809ea27084ee7498a818e52f6f9560b998737a9@sha256:d10ea0c54ecaa861b67942b4adc69178585cd071c9d0c8997fa274a362beea55

tools/dockerfile/distribtest/python_dev_fedora36_x64/Dockerfile

@@ -15,7 +15,7 @@
 FROM fedora:36
 
 RUN yum clean all && yum update -y && yum install -y python3 python3-pip
-RUN python3 -m pip install virtualenv==16.7.9
+RUN python3 -m pip install virtualenv
 
 RUN yum groupinstall -y "Development Tools"
 RUN yum install -y redhat-rpm-config