[aws-for-fluent-bit] offer lifecycle options to configure preStop

[guitarrapc]

Is your feature request related to a problem?
When using Karpenter and node consolidation occurs, Fluent Bit DaemonSet pods may be evicted before application pods, leading to missed logs during the period when Fluent Bit pods are absent but application pods are still running.

Is your feature request related to a specific Helm chart, if yes mention name of the chart?
aws-for-fluent-bit

Describe the solution you'd like

• Add lifecycle section to stable/aws-for-fluent-bit/values.yaml and stable/aws-for-fluent-bit/templates/daemonset.yaml.
• Expanding terminationGracePeriod is also required.

Describe alternatives you've considered
n/a