Tweaks flaking log timing tests from 'assert after' to 'assert not before'

General MR

Summary

@daniel.dides identified an odd test flakiness problem that shows up a lot more in go 1.23.1 on our ARM Macs than it does in go 1.22.x. Sixteen tests were asserting that a logging operation took a nonzero amount of measurable time, and that no longer seems to be the case.

This MR flips the tests from "assert that log time is after start time" to "assert that log time is not before start time" and now those tests aren't failing, even when rerun hundreds of times.

Relevant go release notes

@daniel.dides found some relevant release notes for go 1.23 on changing the behavior of timers.

Relevant logs/screenshots

--- FAIL: TestLogPass (0.00s)
    client_functions_test.go:277:
            Error Trace:    /Users/daniel/radius/bb/bbctl/util/log/client_functions_test.go:277
            Error:          Should be true
            Test:           TestLogPass
            Messages:       logtime: 2024-09-09 09:00:37.416012 -0500 CDT    startTime: 2024-09-09 09:00:37.416012 -0500 CDT

Linked Issue

N/A

Upgrade Notices

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