[ BigSur wk2 arm64 ] http/tests/inspector/network/resource-sizes-network.html is a flakey text failure

[Robert Jenner]

http/tests/inspector/network/resource-sizes-network.html

is a flakey text failure on BigSur in wk2 on Apple Silicon Macs only.

HISTORY:
https://results.webkit.org/?suite=layout-tests&test=http%2Ftests%2Finspector%2Fnetwork%2Fresource-sizes-network.html

TEXT DIFF:
 PASS: responseSource should be Symbol(network).
 size: 2955
 requestBodyTransferSize: 0
-responseBodyTransferSize: 1239
-estimatedNetworkEncodedSize: 1239
-networkEncodedSize: 1239
+responseBodyTransferSize: 1229
+estimatedNetworkEncodedSize: 1229
+networkEncodedSize: 1229
 PASS: estimatedTotalTransferSize should be >= (encoded body size + headers).
 PASS: networkTotalTransferSize should be >= (encoded body size + headers).
 PASS: requestHeadersTransferSize should be non-empty.

[Radar WebKit Bug Importer]

<rdar://problem/77587091>

[Robert Jenner]

I cannot reproduce this failure, as it only occurs on Apple Silicon Macs, and I do not have access to one of those systems. 

The history indicates that the test has been flaky failing fairly close to when it started running on Apple Silicon Macs. 

As such, I have updated the expectations to flaky (Pass Failure) specifically for BigSur wk2 Apple Silicon Macs here:
https://trac.webkit.org/changeset/277066/webkit