Configure tuf resources

[vipulagarwal]

Description of the change

Adding ability to configure k8s resource requests and limits in all the components of tuf.

Existing or Associated Issue(s)

Additional Information

At present, we cannot configure resource requests and limits for some components like one time jobs, initContainers and some deployments via Sigstore helm charts. This becomes a problem when ResourceQuota is defined for namespaces and prevents pods to spin up. It is a best practice to define resource requests and limits for all k8s resources.

Checklist

• [x] Chart version bumped in Chart.yaml according to semver. Where applicable, update and bump the versions in any associated umbrella chart
• [x] Variables are documented in the values.yaml and added to the README.md. The helm-docs utility can be used to generate the necessary content. Use helm-docs --dry-run to preview the content.
• [ ] JSON Schema generated.
• [x] List tests pass for Chart using the Chart Testing tool and the ct lint command.