Initial import of JetStream v2.2

Upstream source: https://github.com/WebKit/WebKit/tree/main/Websites/browserbench.org/JetStream2.2

Bug: 340983089
Change-Id: I2b2a52447a7e0615c7aedda05c9b67a8df045315
Reviewed-on: https://chromium-review.googlesource.com/c/external/github.com/WebKit/JetStream/+/5547899
Reviewed-by: John Chen <[email protected]>
485 files changed