Automated Github Chart releasing

[wajihyassine]

Description of the change

Adds automated releasing for the Helm charts through GH Pages. More details on how this works can be found here and here.

The proposition is to move away from OCI to instead use GH Pages/GH actions releaser for its ease

Installing charts would look something like (will update docs at a later PR):

helm repo add osdfir-infrastructure (or any alias name) https://google.github.io/osdfir-infrastructure
helm install osdfir-infrastructure/osdfir-infrastructure
helm install osdfir-infrastructure/timesketch
helm install osdfir-infrastructure/turbinia

Anytime we merge something in main and the Chart version for any of the charts have been updated, the GH action will automatically create a new release and push to the GH Page.

[wajihyassine]

@hacktobeer @berggren @aarontp PTAL and let me know if any issues with releasing this way directly on GH Pages instead of OCI for ease of use/automated release process

[aarontp]

LGTM. Cool, this should make it easier for releases. I don't have any issues with releasing from GH in general.