feat: add hugepages support

[piyush-jena]

Closes #

Description of changes:

• Add support for hugepages

Testing done:
Set the following settings:

[ssm-user@control]$ apiclient apply  <<EOF
[settings.kernel.hugepages."2Mi"]
> count = 200
> [settings.kernel.hugepages."1Gi"]
> count = 2
> EOF
[ssm-user@control]$ apiclient get settings.kernel.hugepages
{
  "settings": {
    "kernel": {
      "hugepages": {
        "1Gi": {
          "count": 2
        },
        "2Mi": {
          "count": 200
        }
      }
    }
  }
}
[ssm-user@control]$ cat /proc/meminfo | grep ^Huge
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
Hugetlb:               0 kB

The hugepages are not allocated yet because we have set it up to allocate only at boot.

Post reboot:

1. Meminfo output:

bash-5.2# cat /proc/meminfo | grep ^Huge
HugePages_Total:     200
HugePages_Free:      200
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
Hugetlb:         2506752 kB

200 hugepages of default size has been allocated. Hugetlb size = 2048200 + 10485762 = 2506752 kB

2. Describe node output
   $ kubectl describe node --kubeconfig bottlerocket-cluster-134.kubeconfig
   [Output trimmed for brevity]

Capacity:
  cpu:                128
  ephemeral-storage:  20100288Ki
  hugepages-1Gi:      2Gi
  hugepages-2Mi:      400Mi
  memory:             259892560Ki
  pods:               737
Allocatable:
  cpu:                127610m
  ephemeral-storage:  17450683567
  hugepages-1Gi:      2Gi
  hugepages-2Mi:      400Mi
  memory:             248720720Ki
  pods:               737

As we can see the hugepages show up as allocatable resources.

Terms of contribution:

By submitting this pull request, I agree that this contribution is dual-licensed under the terms of both the Apache License, version 2.0, and the MIT license.