Add Bottlerocket support for kubeletConfiguration.evictionSoft

[jonathan-innis]

Description

What problem are you trying to solve?

Bottlerocket AMIs now support EvictionSoft in the latest versions. We should pass in these additional properties from the kubeletConfiguration into the TOML

PR: bottlerocket-os/bottlerocket#2930

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[sktech730]

@jonathan-innis I would like to contribute on this Issue and I am new to open source contributions please let me if there are any other details which need to know before I start working on this.

[ellistarn]

https://karpenter.sh/docs/contributing/

[ecerulm]

Related: chore: Add soft eviction setting to Bottlerocket kublet config #6390

[ecerulm]

Bottlerocket also supports cpuCFSQuota so that should be supported by karpenter too, I've created #6782 to track that specifically but probably both could be implemented in the same PR