Fix #1503, Update timer interval comparison

[pepepr08]

Checklist (Please check before submitting)

• I reviewed the Contributing Guide.
• I signed and emailed the appropriate Contributor License Agreement to [email protected] and copied [email protected].

Describe the contribution

• Fixes Update osal_timer_UT inconsistent results #1503 The timer test logic was relying on undefined/non-guaranteed behavior.
• Also updated the start time used for timers to improve accuracy and make test pass on slower/less accurate systems.
• Updated workflow to do an apt update before the apt install

Testing performed
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1. Build and run tests

Expected behavior changes
A clear and concise description of how this contribution will change behavior and level of impact.

• Test now passes on RTEMS / LEON3

System(s) tested on

• RTEMS 5 / LEON3

Additional context
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Third party code
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Contributor Info - All information REQUIRED for consideration of pull request
Jose F Martinez Pedraza / GSFC 582

[pepepr08]

test using OSAL timer API:

[ FAIL] 05.011 ut_ostimer_timerio_test.c:489 - g_timerGlobal.minDiff (442583) > intervalTime - (intervalTime / 20) (475000)
[ PASS] 05.012 ut_ostimer_timerio_test.c:490 - g_timerGlobal.maxDiff (500000) < intervalTime + (intervalTime / 20) (525000)
[ FAIL] 05.013 ut_ostimer_timerio_test.c:494 - totalTime / g_timerGlobal.callbackMax (494257) > intervalTime - (intervalTime / 200) (497500)
[ PASS] 05.014 ut_ostimer_timerio_test.c:495 - totalTime / g_timerGlobal.callbackMax (494257) < intervalTime + (intervalTime / 200) (502500)

directly using RTEMS timer:

[ PASS] 05.010 ut_ostimer_timerio_test.c:588 - g_timerGlobal.minDiff (499990) > intervalTime - (intervalTime / 20) (475000)
[ PASS] 05.011 ut_ostimer_timerio_test.c:589 - g_timerGlobal.maxDiff (500000) < intervalTime + (intervalTime / 20) (525000)
[ PASS] 05.012 ut_ostimer_timerio_test.c:593 - totalTime / g_timerGlobal.callbackMax (499999) > intervalTime - (intervalTime / 200) (497500)
[ PASS] 05.013 ut_ostimer_timerio_test.c:594 - totalTime / g_timerGlobal.callbackMax (499999) < intervalTime + (intervalTime / 200) (502500)

using g_clkAccuracy*5:

[ PASS] 05.011 ut_ostimer_timerio_test.c:489 - g_timerGlobal.minDiff (499975) > intervalTime - (intervalTime / 20) (475000)
[ PASS] 05.012 ut_ostimer_timerio_test.c:490 - g_timerGlobal.maxDiff (500001) < intervalTime + (intervalTime / 20) (525000)
[ PASS] 05.013 ut_ostimer_timerio_test.c:494 - totalTime / g_timerGlobal.callbackMax (499997) > intervalTime - (intervalTime / 200) (497500)
[ PASS] 05.014 ut_ostimer_timerio_test.c:495 - totalTime / g_timerGlobal.callbackMax (499997) < intervalTime + (intervalTime / 200) (502500)