Reduced FCL_Elliptic_ZZ.ecdsa_verify gas cost without `switch` ( -378 gas )

[jayden-sudo]

With the code equivalent, executing FCL_Elliptic_ZZ.ecdsa_verify reduced gas cost by 2600 gas:

	Gas
Before	212970 gas
After	212592 gas

• Testing step:

  1. cd solidity/tests/WebAuthn_forge
     forge test --ffi --match-test test_webauthn_Base64URL_checkSignature --gas-report 

Gas Optimization Records for ecdsa_verify:

1. Changed from calling ModExp to staticcall ModExp, reducing the number of parameters.

   1. The function was also changed to view.

2. Replaced uint256[6] memory pointer with pointer := mload(0x40), reducing calls like MSTORE(0x40).

3. Performed assembly optimizations.

   1. 
      // before
      eq(x, 0)
      // after
      iszero(x) ```

4. Calldata cache, avoid frequent call of calldataload

   1. 
      function f(uint256[2] calldata rs) returns (bool success){ 
      // before 
      if (rs[0] == 0 || rs[0] >= n || rs[1] == 0 || rs[1] >= n){ return false; } 
      // after 
      uint256 r = rs[0]; 
      uint256 s = rs[1]; 
      
      } ```