fix: Make install-infractl work when using container.image

[msugakov]

Description

I noticed that install-infractl fails when the job executes not just with runs-on: ubuntu-latest but also with

    container:
      image: quay.io/stackrox-io/apollo-ci:stackrox-ui-test-0.5.3

The reasons aren't entirely clear because this image has ~/.local/bin in its $PATH:

$ echo $PATH
/root/.local/bin:/root/bin:/go/bin:/usr/local/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/pgsql-14/bin:/opt/gradle/bin

$ echo $HOME
/root

Nevertheless, updating $PATH helps and so here's the suggested fix.

Testing

See https://github.com/stackrox/test-gh-actions/pull/246/changes.

• There's demo-original-failing-in-container showing how this action fails when in container https://github.com/stackrox/test-gh-actions/actions/runs/23065554396/job/67002856073?pr=246#step:3:13
• There's demo-new-passing-in-container showing how the updated action feels fine https://github.com/stackrox/test-gh-actions/actions/runs/23065879882/job/67003932144?pr=246#step:4:5