Fix platforms -> platform in test metadata

[Mab879]

Description:

grep -lr '# platforms = ' linux_os | xargs sed -i "s/# platforms =/# platform =/"

The keyword platforms is not valid.

Rationale:

Make the tests work as expected.

[github-actions]

Start a new ephemeral environment with changes proposed in this pull request:

rhel7 (from CTF) Environment (using Fedora as testing environment)

Fedora Testing Environment

Oracle Linux 8 Environment

[Mab879]

@dodys @mpurg just an FYI.

The reason why I caught this is testing after #12042 was merged.

I might try to add some CI to catch this.

[github-actions]

🤖 A k8s content image for this PR is available at:
ghcr.io/complianceascode/k8scontent:12057
This image was built from commit: dca2547

Click here to see how to deploy it

If you alread have Compliance Operator deployed:
utils/build_ds_container.py -i ghcr.io/complianceascode/k8scontent:12057

Otherwise deploy the content and operator together by checking out ComplianceAsCode/compliance-operator and:
CONTENT_IMAGE=ghcr.io/complianceascode/k8scontent:12057 make deploy-local

[codeclimate]

Code Climate has analyzed commit dca2547 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 59.4% (0.0% change).

View more on Code Climate.

[jan-cerny]

@Mab879 Can we have a check in the headers parser for invalid keywords? I assume that it could be difficult because of various comments but we could limit it to check the lines that contains an = sign.

[mpurg]

Thanks for catching this. Sorry for the troubles.

[dodys]

perhaps this should be in the ctests?

[Mab879]

@Mab879 Can we have a check in the headers parser for invalid keywords? I assume that it could be difficult because of various comments but we could limit it to check the lines that contains an = sign.

I can, but that should in a separate PR.

[dodys]

lgtm, thanks!