New SolarWinds Observability Scaler

[gantrior]

Added SolarWinds Observability scaler

• Using go version of SolarWinds Observability SDK: https://github.com/solarwinds/swo-sdk-go/tree/main/swov1 to get data

Checklist

• When introducing a new scaler, I agree with the scaling governance policy
• I have verified that my change is according to the deprecations & breaking changes policy
• Tests have been added
• Changelog has been updated and is aligned with our changelog requirements
• A PR is opened to update our Helm chart (repo) (if applicable, ie. when deployment manifests are modified)
• A PR is opened to update the documentation on (repo) (if applicable)
• Commits are signed with Developer Certificate of Origin (DCO - learn more)

Fixes #6576

PR to docs: kedacore/keda-docs#1545

TODOs:

• Add E2E tests
• Add PR to Docs

[zroubalik]

Great adddition, just FYI we plan to ship a new KEDA release in coming days (in case you would like to have this feature in)

[gantrior]

Great adddition, just FYI we plan to ship a new KEDA release in coming days (in case you would like to have this feature in)

I would be happy to ship it in the release, unfortunatelly at the moment I do not have time to complete E2E testing part. I will work out the remaining TODOs as soon as I can and properly verify it, It is ok to have it as part of the next release.

[zroubalik]

Great adddition, just FYI we plan to ship a new KEDA release in coming days (in case you would like to have this feature in)

I would be happy to ship it in the release, unfortunatelly at the moment I do not have time to complete E2E testing part. I will work out the remaining TODOs as soon as I can and properly verify it, It is ok to have it as part of the next release.

Not a problem, I completely understand. (Un)fortunately we have a policy to not merge scalers without e2e tests coverage. If we don't hit this release, we can definitely merge it in the next one.