Exclude more bad runs

[gsnedders]

https://wpt.fyi/results/hr-time?run_id=306590006&run_id=287320007&run_id=304930003&run_id=295140002&run_id=298830001&run_id=271610005&run_id=296910009&run_id=296950001&run_id=277150009&run_id=304980001&run_id=309820007&run_id=285510005&run_id=289740005&run_id=298820002&run_id=281390002 looks kinda bad, like there's a bunch of broken runs. Probably need to mark 2019-08-30 till 2019-09-01 as bad runs.

[gsnedders]

https://wpt.fyi/results/?q=status%3Aok%20status%3Amissing%20%21sharedworker&run_id=5083329328054272&run_id=5656316687155200&run_id=5667917377044480&run_id=6228406179987456&run_id=5719016129691648&run_id=6223264248496128 suggests 2021-06-04 is bad.

[gsnedders]

https://wpt.fyi/results/?q=count%3A1%28status%3Amissing%29&run_id=5636263199637504&run_id=5650409228075008 suggests 2021-06-02 is bad.

[gsnedders]

2021-05-31: https://wpt.fyi/results/?run_id=5651407740862464&run_id=5703758291927040

[gsnedders]

2021-05-18: https://wpt.fyi/results/?q=count%3A1%28status%3Amissing%29%20status%3Aok&run_id=4810871970725888&run_id=5681999417180160

[gsnedders]

2021-05-10: https://wpt.fyi/results/?q=count%3A1%28status%3Amissing%29%20status%3Aok&run_id=5649918024744960&run_id=5660554377035776

[gsnedders]

I'm gonna stop going through Firefox things, because it looks like a lot of runs in this time period failed: https://wpt.fyi/results/?label=master&label=experimental&max-count=15&to=2021-05-10T00%3A00%3A00.000Z&product=firefox&q=status%3Amissing%20