Cleanup outdated FT/NFT related contract codes and tests

[SupunS]

Closes #2719, #2503

Description

There are still codes mimicking the actual FT/NFT contracts. e.g:

cadence/tests/ft_test.go

Line 38 in 0b1fc2b

const modifiedFungibleTokenContractInterface = `

These are used by the

• Benchmarks:
  

  cadence/tests/ft_test.go

  Line 583 in 0b1fc2b

  func BenchmarkRuntimeFungibleTokenTransfer(b *testing.B) {

  
  Where the code is mostly used as some token transfer logic, only to benchmark the cadence runtime implementation, and doesn't necessarily has to reflect the exact FT/NFT contracts.

• Recovery tests:
  

  cadence/tests/ft_test.go

  Line 928 in 0b1fc2b

  func TestRuntimeBrokenFungibleTokenRecovery(t *testing.T) {

  
  Here also, it is only needed to check the recovery logic works, and doesn't has to reflect the actual FT/NFT contracts

So kept these ones as is. All these contracts are already updated to C1.0 (#3471).

---

• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• Code follows the standards mentioned here
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[github-actions]

Cadence Benchstat comparison

This branch with compared with the base branch onflow:master commit 0b1fc2b
The command for i in {1..N}; do go test ./... -run=XXX -bench=. -benchmem -shuffle=on; done was used.
Bench tests were run a total of 7 times on each branch.

Collapsed results for better readability

[turbolent]

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