schedule actions to run at least 3 times a week

[dgrove-oss]

Add schedule clause to GitHub actions to cause them to run 3 times a week. Schedule is offset by 1 hour for each workflow file to avoid heavy spikes.

[codecov-commenter]

Codecov Report

Merging #5369 (1eeacd1) into master (21c9a63) will decrease coverage by 71.26%.
The diff coverage is n/a.

❗ Current head 1eeacd1 differs from pull request most recent head fae737d. Consider uploading reports for the commit fae737d to get more accurate results

@@            Coverage Diff             @@
##           master   #5369       +/-   ##
==========================================
- Coverage   75.78%   4.52%   -71.26%     
==========================================
  Files         240     240               
  Lines       14407   14407               
  Branches      601     601               
==========================================
- Hits        10918     652    -10266     
- Misses       3489   13755    +10266     

Impacted Files	Coverage Δ
.../main/scala/org/apache/openwhisk/core/WarmUp.scala	0.00% <0.00%> (-100.00%)	⬇️
...ain/scala/org/apache/openwhisk/spi/SpiLoader.scala	0.00% <0.00%> (-100.00%)	⬇️
...n/scala/org/apache/openwhisk/utils/JsHelpers.scala	0.00% <0.00%> (-100.00%)	⬇️
...scala/org/apache/openwhisk/common/Prometheus.scala	0.00% <0.00%> (-100.00%)	⬇️
...scala/org/apache/openwhisk/common/time/Clock.scala	0.00% <0.00%> (-100.00%)	⬇️
...scala/org/apache/openwhisk/core/FeatureFlags.scala	0.00% <0.00%> (-100.00%)	⬇️
...scala/org/apache/openwhisk/http/CorsSettings.scala	0.00% <0.00%> (-100.00%)	⬇️
...ala/org/apache/openwhisk/common/ConfigMXBean.scala	0.00% <0.00%> (-100.00%)	⬇️
...la/org/apache/openwhisk/http/BasicRasService.scala	0.00% <0.00%> (-100.00%)	⬇️
...a/org/apache/openwhisk/common/ConfigMapValue.scala	0.00% <0.00%> (-100.00%)	⬇️
... and 194 more

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