Add support for ImagePullSecrets field in the Helm chart

[daniil-nedostup]

Is your feature request related to a problem? Please describe.
Currently, the Helm chart in this repository does not provide a way to specify ImagePullSecrets in the relevant Kubernetes manifests (e.g., Deployment). This limitation makes it difficult to pull images from private container registries that require authentication.

Describe the solution you'd like
The Helm chart should be updated to allow defining ImagePullSecrets, enabling users to specify credentials for private registries when deploying the component. This can be achieved by adding an optional field in the Helm values and modifying the necessary Kubernetes resources (e.g., Deployment, StatefulSet) to use it.

Describe alternatives you've considered
Manually patching the deployed resources after installation.

Additional context
This change would improve flexibility and make it easier to deploy the component in environments that rely on private image registries.