[release-5.0] NO-ISSUE: Disable journald rate limiting in logging test

[agullon]

Summary

Backport of #7304 to release-5.0.

• The "Case Insensitive Log Levels" RF test fails on ARM when testing TraceAll because klog verbosity 10 generates ~144K journal messages, exceeding journald's default rate limit (10K messages / 30s). The suppressed messages include the startup config dump line (logLevel.*TraceAll) that the test greps for via journalctl --grep, making the assertion impossible to satisfy.
• Adds Disable Journal Rate Limiting / Enable Journal Rate Limiting keywords to systemd.resource that write/remove a journald drop-in with RateLimitBurst=0 and restart the journal service.
• Scopes the fix to the logging suite only: disables rate limiting in suite setup and re-enables in teardown.

Test plan

• Verify the logging test passes on ARM with TraceAll (was the failing case)
• Verify the logging test still passes for normal, Debug, TRACE levels
• Verify journald rate limiting is re-enabled after the test suite completes

🤖 Generated with Claude Code

[openshift-merge-bot]

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[openshift-ci-robot]

@agullon: This pull request explicitly references no jira issue.

Details

In response to this:

Summary

Backport of #7304 to release-5.0.

• The "Case Insensitive Log Levels" RF test fails on ARM when testing TraceAll because klog verbosity 10 generates ~144K journal messages, exceeding journald's default rate limit (10K messages / 30s). The suppressed messages include the startup config dump line (logLevel.*TraceAll) that the test greps for via journalctl --grep, making the assertion impossible to satisfy.
• Adds Disable Journal Rate Limiting / Enable Journal Rate Limiting keywords to systemd.resource that write/remove a journald drop-in with RateLimitBurst=0 and restart the journal service.
• Scopes the fix to the logging suite only: disables rate limiting in suite setup and re-enables in teardown.

Test plan

• Verify the logging test passes on ARM with TraceAll (was the failing case)
• Verify the logging test still passes for normal, Debug, TRACE levels
• Verify journald rate limiting is re-enabled after the test suite completes

🤖 Generated with Claude Code

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[openshift-ci]

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[openshift-ci]

@agullon: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/verify	0514d7c	link	true	/test verify

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[agullon]

Consolidated into #7327