tests: update wycheproof files #1670

1. 
   RandomLattice commented at 10:48 am on May 13, 2025: contributor

   Wycheproof ownership was recently moved to C2SP (https://github.com/C2SP/wycheproof). This PR updates all references to the new URL and bumps to the latest version of the vector files.

   This commit does not change the content of processed .h testvector files. To test:

   0make clean-testvectors testvectors
   

   See: #1492 (review)

2. tests: update wycheproof files

   Wycheproof ownership was recently moved to C2SP
   (https://github.com/C2SP/wycheproof). This PR updates all references to the new
   URL and bumps to the latest version of the vector files.
   
   This commit does not change the content of processed .h testvector files. To test:
   ```
   make clean-testvectors testvectors
   ```
   
   See: https://github.com/bitcoin-core/secp256k1/pull/1492#discussion_r1572443456
   
   Co-authored-by: Sean Andersen <6730974+andozw@users.noreply.github.com>

   d73ed99479
3. 
   sipa commented at 3:11 pm on May 13, 2025: contributor

   utACK d73ed994799ef632ca4a26b4e73f51ec5cfaad79
4. bitcoin-core deleted a comment on May 14, 2025
5. jonasnick approved
6. 
   jonasnick commented at 6:50 am on May 14, 2025: contributor

   ACK d73ed994799ef632ca4a26b4e73f51ec5cfaad79
7. jonasnick merged this on May 14, 2025
8. jonasnick closed this on May 14, 2025

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Contributors
RandomLattice sipa jonasnick