### Summary

I know there is some ongoing work to mitigate these problems, but since I'm not aware which parts have already been addressed and which not, I want to share some common failures here which I've seen during the last days:

1. When running `ansible-test sanity --color -v --junit --coverage-check --changed --docker --base-branch origin/main --skip-test pylint --skip-test ansible-doc --skip-test validate-modules --allow-disabled` in CI, the Python 2.6 `import` test fails:
```
02:05 ERROR: Command "/root/ansible_collections/community/general/tests/output/.tmp/sanity/import/minimal-py26/bin/python /root/ansible/test/lib/ansible_test/_data/quiet_pip.py install --disable-pip-version-check coverage -c /root/ansible/test/lib/ansible_test/_data/requirements/constraints.txt" returned exit status 1.
02:05 >>> Standard Error
02:05 Could not find a version that satisfies the requirement coverage<5.0.0,>=4.5.1 (from -c /root/ansible/test/lib/ansible_test/_data/requirements/constraints.txt (line 2)) (from versions: )
02:05 No matching distribution found for coverage<5.0.0,>=4.5.1 (from -c /root/ansible/test/lib/ansible_test/_data/requirements/constraints.txt (line 2))
02:05 >>> Standard Output
02:05 Collecting coverage<5.0.0,>=4.5.1 (from -c /root/ansible/test/lib/ansible_test/_data/requirements/constraints.txt (line 2))
```
(See https://app.shippable.com/github/ansible-collections/community.general/runs/8257/1/console for the full log)

2. When running unit tests for Python 2.6 with `ansible-test units -v --color --docker --coverage` with `unittest2 ; python_version < '2.7'` in tests/unit/requirements.txt, it fails:
```
Run command: /usr/bin/python2.6 /root/ansible/test/lib/ansible_test/_data/quiet_pip.py install --disable-pip-version-check -r /root/ansible/test/lib/ansible_test/_data/requirements/units.txt -r tests/unit/requirements.txt coverage -c /root/ansible/test/lib/ansible_test/_data/requirements/constraints.txt
Collecting unittest2 (from -r tests/unit/requirements.txt (line 1))
  Could not find a version that satisfies the requirement unittest2 (from -r tests/unit/requirements.txt (line 1)) (from versions: )
No matching distribution found for unittest2 (from -r tests/unit/requirements.txt (line 1))
ERROR: Command "/usr/bin/python2.6 /root/ansible/test/lib/ansible_test/_data/quiet_pip.py install --disable-pip-version-check -r /root/ansible/test/lib/ansible_test/_data/requirements/units.txt -r tests/unit/requirements.txt coverage -c /root/ansible/test/lib/ansible_test/_data/requirements/constraints.txt" returned exit status 1.
```
(See https://github.com/ansible-collections/community.hrobot/runs/2264772861?check_suite_focus=true)


### Issue Type

Bug Report

### Component Name

ansible-test

### Ansible Version

```console (paste below)
devel
```


### Configuration

...

### OS / Environment

...

### Steps to Reproduce

...

### Expected Results

...

### Actual Results

...
if args.debug_strategy:
        env.update(dict(ANSIBLE_STRATEGY='debug'))
    if 'non_local/' in target.aliases:
        if args.coverage:
            display.warning('Skipping coverage reporting on Ansible modules for non-local test: %s' % target.name)
        env.update(dict(ANSIBLE_TEST_REMOTE_INTERPRETER=''))
    env.update(integration)
    return env
def command_integration_script(args, target, test_dir, inventory_path, temp_path, remote_temp_path=None):
    """
    :type args: IntegrationConfig
    :type target: IntegrationTarget
    :type test_dir: str
    :type inventory_path: str
    :type temp_path: str
    :type remote_temp_path: str | None
    """
    display.info('Running %s integration test script' % target.name)
    env_config = None
    if isinstance(args, PosixIntegrationConfig):
        cloud_environment = get_cloud_environment(args, target)
        if cloud_environment:
            env_config = cloud_environment.get_environment_config()
    with integration_test_environment(args, target, inventory_path) as test_env:
        cmd = ['./%s' % os.path.basename(target.script_path)]
        if args.verbosity:
            cmd.append('-' + ('v' * args.verbosity))
        env = integration_environment(args, target, test_dir, test_env.inventory_path, test_env.ansible_config, env_config)
        cwd = os.path.join(test_env.targets_dir, target.relative_path)
        env.update(dict(