Use established pattern for kubelet metrics url

[dims]

Fix for the the following error:
https://storage.googleapis.com/k8s-triage/index.html?text=container_metrics_test.go%3A119&xtext=container_spec_memory_swap_limit_bytes

from the logs:

[FAILED] Timed out after 60.001s.
The function passed to Eventually returned the following error:
    <*url.Error | 0x40009356b0>: 
    Get "http://i-0784eddc5b539f8e0:10255/metrics/cadvisor": dial tcp: lookup i-0784eddc5b539f8e0 on 172.31.0.2:53: no such host
    {
        Op: "Get",
        URL: "http://i-0784eddc5b539f8e0:10255/metrics/cadvisor",
        Err: <*net.OpError | 0x400054e910>{
            Op: "dial",
            Net: "tcp",
            Source: nil,
            Addr: nil,
            Err: <*net.DNSError | 0x400054e8c0>{
                UnwrapErr: nil,
                Err: "no such host",
                Name: "i-0784eddc5b539f8e0",
                Server: "172.31.0.2:53",
                IsTimeout: false,
                IsTemporary: false,
                IsNotFound: true,
            },
        },
    }
In [It] at: k8s.io/kubernetes/test/e2e_node/container_metrics_test.go:119 @ 03/21/25 03:16:17.564

The DNS lookup may not work properly, we currently use a pattern, so let's not invent a new one just for this test.

problem introduced by the same PR! #126213

What type of PR is this?

/kind failing-test

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

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[dims]

cc @bitoku @haircommander
/assign @SergeyKanzhelev @pacoxu

[dims]

/release-note-none

[dims]

/priority critical-urgent

[dims]

/retest

[tzneal]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

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Git tree hash: 3675576b3bdadfe283effccb53d479495f1384c8

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dims, tzneal

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[dims]

/milestone v1.33

[haircommander]

Thanks @dims !