add SYS_ADMIN capabilities to DCGM

[movence]

Related change in the operator: aws/amazon-cloudwatch-agent-operator#319

Issue

Open issue: #34
Missing SYS_ADMIN capabilities with DCGM exporter causes a privilege error during the exporter start up

Description of changes:

• Add SYS_ADMIN capabilities

Test

• before change

Warning #2: dcgm-exporter doesn't have sufficient privileges to expose profiling metrics. To get profiling metrics with dcgm-exporter, use --cap-add SYS_ADMIN
2025/06/11 19:46:06 maxprocs: Updating GOMAXPROCS=1: using minimum allowed GOMAXPROCS
time="2025-06-11T19:46:06Z" level=info msg="Starting dcgm-exporter"
time="2025-06-11T19:46:06Z" level=info msg="DCGM successfully initialized!"
...

• after change

2025/06/11 19:47:10 maxprocs: Updating GOMAXPROCS=1: using minimum allowed GOMAXPROCS
time="2025-06-11T19:47:10Z" level=info msg="Starting dcgm-exporter"
time="2025-06-11T19:47:10Z" level=info msg="DCGM successfully initialized!"
...

Confirmed GPU metrics getting emitted on a bottlerocket instance

kc describe node ip-{IP}.us-west-2.compute.internal | grep -i "os image"
  OS Image:                   Bottlerocket OS 1.40.0 (aws-k8s-1.33-nvidia)

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[sky333999]

revert

[movence]

oops reverted