fix for:
> This is a scheduled Windows Server 2019 brownout.
> The Windows Server 2019 image will be removed on 2025-06-30.
> For more details, see actions/runner-images#12045
namely, these workflows:
test-e2e, test-ui, and test-windows
extra-curricularly, as part of the overall
migration effort company-wide, this also includes
some standardization such as:
* explicit permissions:read on various workflows
* pinned action version shas (per https://github.com/hashicorp/security-public-tsccr)
* actionlint, which among other things runs
shellcheck on GHA run steps
Co-authored-by: emilymianeil <eneil@hashicorp.com>
Co-authored-by: Daniel Kimsey <daniel.kimsey@hashicorp.com>