merge_pr_51910

SpeculationRules: Move WPTs for speculation tags into its own directory

This CL moves WPTs for speculation tags from speculation-rules/prefetch
to speculation-rules/speculation-tags, as these tests are for both
prefetch and prerender, not only for prefetch.

Bug: 404294138
Change-Id: I1668b09e83c71bf6a1bd92ecf001e01385e20b9b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6437938
Commit-Queue: Domenic Denicola [email protected]
Auto-Submit: Hiroki Nakagawa [email protected]
Reviewed-by: Huanpo Lin [email protected]
Reviewed-by: Domenic Denicola [email protected]
Cr-Commit-Position: refs/heads/main@{#1444501}