🐛 Drop quiet option of grep to avoid race condition with pipefail

[fenggw-fnst]

What this PR does / why we need it:
The grep -q closes input pipe immediately if any match is found, while the command on the left side will exit with SIGPIPE when it tries to write to a closed pipe, causing the Metal3 Pod to get stuck in CrashLoopBackOff sometimes.

Which issue(s) this PR fixes:
Fixes #611

[metal3-io-bot]

Hi @fenggw-fnst. Thanks for your PR.

I'm waiting for a metal3-io member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[tuminoid]

/ok-to-test

[Rozzii]

/test metal3-centos-e2e-integration-test-main
/test metal3-ubuntu-e2e-integration-test-main
/lgtm

[Rozzii]

/cc @elfosardo

[tuminoid]

/retest

[tuminoid]

/retest

[tuminoid]

/retest

[tuminoid]

/retest
Network flakes.

[elfosardo]

/approve

[metal3-io-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: elfosardo, tuminoid

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[tuminoid]

/retest

[tuminoid]

/retest
Amount of network flakes these days .... :(

[tuminoid]

This has now come up here at least two times, I don't see this come up elsewhere.

[2025-01-27T12:11:02.168Z]   [FAILED] Unexpected error:
[2025-01-27T12:11:02.168Z]       <*errors.Error | 0xc001313e00>: 
[2025-01-27T12:11:02.168Z]       unable to find field ".spec.ipAddresses.0" in replacement target
[2025-01-27T12:11:02.168Z]       {
[2025-01-27T12:11:02.168Z]           Err: <*errors.errorString | 0xc000d32160>{
[2025-01-27T12:11:02.168Z]               s: "unable to find field \".spec.ipAddresses.0\" in replacement target",
[2025-01-27T12:11:02.168Z]           },

edit: ok, something is broken elsewhere per today, this is not coming from this PR.

[tuminoid]

/retest
e2e should be working now.