[WIP] Secp256r1 support for ECDSA verify and decompress opcodes

[algoidurovic]

ECDSA opcodes only support the Secp256k1 curve. The goal of this PR is to extend the opcodes to support the Secp256r1 curve as well. Note: the PkRecover opcode is not covered here.

Testing included correctness and benchmark tests. Benchmark tests indicate a significant slowdown when the Secp256r1 curve is used, meaning the current opcode cost may not be viable.

Added some helper test functions.

[jasonpaulos]

From doc.go for ecdsa_verify:

The signed data must be 32 bytes long, and signatures in lower-S form are only accepted

I suspect these constraints might not be true for the secp256r1 curve. And if that's the case we should document it (or decide to enforce them).

[codecov-commenter]

Codecov Report

Merging #3495 (f1984c0) into master (93a372d) will decrease coverage by 0.10%.
The diff coverage is 21.21%.

@@            Coverage Diff             @@
##           master    #3495      +/-   ##
==========================================
- Coverage   47.57%   47.46%   -0.11%     
==========================================
  Files         370      370              
  Lines       60060    60213     +153     
==========================================
+ Hits        28572    28579       +7     
- Misses      28178    28323     +145     
- Partials     3310     3311       +1     

Impacted Files	Coverage Δ
data/transactions/logic/assembler.go	77.15% <0.00%> (-1.22%)	⬇️
data/transactions/logic/doc.go	77.41% <ø> (ø)
data/transactions/logic/opcodes.go	100.00% <ø> (ø)
data/transactions/logic/fields_string.go	5.80% <10.00%> (+0.32%)	⬆️
data/transactions/logic/eval.go	82.18% <23.80%> (-3.51%)	⬇️
data/transactions/logic/fields.go	76.08% <57.14%> (-1.57%)	⬇️
agreement/cryptoVerifier.go	75.17% <0.00%> (-2.13%)	⬇️
agreement/proposalManager.go	96.07% <0.00%> (-1.97%)	⬇️
catchup/service.go	69.62% <0.00%> (-0.50%)	⬇️
... and 4 more

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[michaeldiamant]

Closing because:

• The PR is merged into AVM: FIDO2 OpCodes #3514.
• New issue exists to refine secp256r1 curve cost: AVM: Reassess ECDSA opcode cost with secp256r1 curve #3776.