Change Details

``` Add a new run_inverse_tests that replaces all existing field/scalar inverse tests, and tests a few identities for fixed inputs, small numbers (-999...999), random inputs (structured and unstructured), as well as comparing with the output of secp256k1_fe_inv_all_var. ``` Partial backport of secp256k1#831: https://github.com/bitcoin-core/secp256k1/pull/831/commits/aa9cc5218001f14f4312bde1058417d4b755fd11 Depends on D9405.

``` Add a new run_inverse_tests that replaces all existing field/scalar inverse tests, and tests a few identities for fixed inputs, small numbers (-999...999), random inputs (structured and unstructured), as well as comparing with the output of secp256k1_fe_inv_all_var. ``` Partial backport of [[https://github.com/bitcoin-core/secp256k1/pull/831 | secp256k1#831]]: https://github.com/bitcoin-core/secp256k1/pull/831/commits/aa9cc5218001f14f4312bde1058417d4b755fd11 Depends on D9405.

``` Add a new run_inverse_tests that replaces all existing field/scalar inverse tests, and tests a few identities for fixed inputs, small numbers (-999...999), random inputs (structured and unstructured), as well as comparing with the output of secp256k1_fe_inv_all_var. ``` Partial backport of [[https://github.com/bitcoin-core/secp256k1/pull/831 | secp256k1#831:]]: https://github.com/bitcoin-core/secp256k1/pull/831/commits/aa9cc5218001f14f4312bde1058417d4b755fd11 Depends on D9405.