Add k8s-1.35 and ecr-credential-provider-1.35 pkgs with pre-release sources

[ytsssun]

Issue number:

Related to: bottlerocket-os/bottlerocket#4725

Description of changes:

Initial set of changes for kubernetes 1.35 support:

• Add a kubernetes-1.35 pkg with the EKS-D k8s-1.35 beta source (v1.35.0-beta.0)
• Add a ecr-credential-provider-1.35 pkg with the 1.35.0 source

Key changes:

• Remove --pod-infra-container-image kubelet flag (removed upstream in 1.35)

Testing done:

• Core-kit builds with the new packages
• Instance using the 1.35-beta.0 kubelet boots
  kubelet version is reported correctly

   bash-5.1# kubelet --version
   Kubernetes v1.35.0-beta.0-eks-7980c10
  

  Node joined cluster

  k get nodes
  NAME                                            STATUS   ROLES    AGE     VERSION
  ip-192-168-2-215.us-west-2.compute.internal     Ready    <none>   2m3s    v1.35.0-beta.0-eks-7980c10
  

• RPM info to verify rpmvercmp

rpm -qpi build/rpms/kubernetes-1.35/bottlerocket-kubelet-1.35-1.35.0-0.beta0.1767128447.473aa566.br1.x86_64.rpm 
Name        : bottlerocket-kubelet-1.35
Version     : 1.35.0
Release     : 0.beta0.1767128447.473aa566.br1
Architecture: x86_64
Install Date: (not installed)
Group       : Unspecified
Size        : 1579759
License     : Apache-2.0 AND BSD-3-Clause
Signature   : (none)
Source RPM  : bottlerocket-kubernetes-1.35.0-0.beta0.1767128447.473aa566.br1.src.rpm
Build Date  : Tue 30 Dec 2025 09:07:20 PM UTC
Build Host  : localhost
URL         : https://github.com/kubernetes/kubernetes
Summary     : Container cluster node agent
Description :
Container cluster node agent.

rpm -qpi build/rpms/ecr-credential-provider-1.35/bottlerocket-ecr-credential-provider-1.35-1.35.0-1.1767144308.398157c0.br1.x86_64.rpm 
Name        : bottlerocket-ecr-credential-provider-1.35
Version     : 1.35.0
Release     : 1.1767144308.398157c0.br1
Architecture: x86_64
Install Date: (not installed)
Group       : Unspecified
Size        : 1095302
License     : Apache-2.0
Signature   : (none)
Source RPM  : bottlerocket-ecr-credential-provider-1.35-1.35.0-1.1767144308.398157c0.br1.src.rpm
Build Date  : Wed 31 Dec 2025 01:25:48 AM UTC
Build Host  : localhost
URL         : https://github.com/kubernetes/cloud-provider-aws
Summary     : Amazon ECR credential provider
Description :
Amazon ECR credential provider.

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.

[koooosh]

We should fix the Release field for ECR cred provider, but the rest are just nits

[ytsssun]

Force push to address comments from @koooosh

[koooosh]

The rpm info for ecr-credential-provider-1.35 needs to be updated in the description since we updated some of the fields, but overall LGTM.