fix(datadog): rename ci values files to be properly tested

[clamoriniere]

What this PR does / why we need it:

rename some datadog ci values.yaml files to add the values.yaml prefix.
to be executed in the ci testing, the file need to finish by -values.yaml

 rename charts/datadog/ci/{agent-sbom-snapshotter.yaml => agent-sbom-snapshotter-values.yaml} (100%)
 rename charts/datadog/ci/{autoscaling.yaml => autoscaling-values.yaml} (100%)
 rename charts/datadog/ci/{image-digest.yaml => image-digest-values.yaml} (93%)
 rename charts/datadog/ci/{otlp-ingest.yaml => otlp-ingest-values.yaml} (80%)

then fix several issues in the files like

charts/datadog/ci/otlp-ingest-values.yaml
  Error: 6:10 [indentation] wrong indentation: expected 10 but found 9

Which issue this PR fixes

(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged)

• fixes #

Special notes for your reviewer:

I haven't update the chart and changelog, since this PR doesn't modify the options or docs.

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• Chart Version bumped
• Documentation has been updated with helm-docs (run: .github/helm-docs.sh)
• CHANGELOG.md has been updated
• Variables are documented in the README.md
• For Datadog Operator chart or value changes update the test baselines (run: make update-test-baselines)