Add sidecar containers to resource requests computation

[IrvingMg]

What type of PR is this?

/kind bug

What this PR does / why we need it:

Includes SidecarContainers in the computation of total resource requests of a pod.

Which issue(s) this PR fixes:

Fixes #2068

Special notes for your reviewer:

The new formula to calculate the total was extracted from KEP-753.

Does this PR introduce a user-facing change?

Fix the resource requests computation taking into account sidecar containers.

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[alculquicondor]

Please add a release note.

[gabesaba]

How urgent is this? Is it acceptable to wait until kubernetes/kubernetes#124537 is fixed, and use that library? @alculquicondor

[alculquicondor]

No, we cannot wait. That change will only be available in a released module when all of v1.31 is released, which will be ~3 months from now.

[gabesaba]

overall lgtm, just a few nits. thanks for addressing the comments.

[alculquicondor]

unit tests look solid :)

[IrvingMg]

/test pull-kueue-test-integration-main

[gabesaba]

lgtm

[alculquicondor]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: df9454efb9a3ffa1eafdb3d2d48d9edc8dc9219d

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alculquicondor, IrvingMg

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[alculquicondor]

/cherry-pick release-0.6

[k8s-infra-cherrypick-robot]

@alculquicondor: once the present PR merges, I will cherry-pick it on top of release-0.6 in a new PR and assign it to you.

In response to this:

/cherry-pick release-0.6

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[k8s-infra-cherrypick-robot]

@alculquicondor: #2099 failed to apply on top of branch "release-0.6":

Applying: Add sidecar containers to resource requests computation
Applying: Refactor init containers resource computation
Applying: Refactor tests cases using Container wrapper
Using index info to reconstruct a base tree...
M	pkg/util/testing/wrappers.go
Falling back to patching base and 3-way merge...
Auto-merging pkg/util/testing/wrappers.go
CONFLICT (content): Merge conflict in pkg/util/testing/wrappers.go
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0003 Refactor tests cases using Container wrapper
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-0.6

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[tenzen-y]

@IrvingMg Could you open a PR manually?