[jfx17u] RFR: 8278980: Update WebKit to 613.1

[Kevin Rushforth]

Clean backport to jfx17u. CI build passed on three platforms. Tested locally on macOS.

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Commit messages:
 - 8278980: Update WebKit to 613.1

Changes: https://git.openjdk.java.net/jfx17u/pull/33/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx17u&pr=33&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8278980
  Stats: 412962 lines in 6737 files changed: 231442 ins; 135635 del; 45885 mod
  Patch: https://git.openjdk.java.net/jfx17u/pull/33.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx17u pull/33/head:pull/33

PR: https://git.openjdk.java.net/jfx17u/pull/33