feat: switch away from the direct serde_tuple import

[Stebalien]

This way, the version in fvm_ipld_encoding always agrees.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.00%. Comparing base (7849b86) to head (0e053ad).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #249   +/-   ##
=======================================
  Coverage   89.00%   89.00%           
=======================================
  Files          27       27           
  Lines        5765     5765           
=======================================
  Hits         5131     5131           
  Misses        634      634           

Files with missing lines	Coverage Δ
frc46_token/src/receiver.rs	100.00% <ø> (ø)
frc46_token/src/token/types.rs	100.00% <ø> (ø)
frc53_nft/src/receiver.rs	100.00% <ø> (ø)
frc53_nft/src/types.rs	100.00% <ø> (ø)
fvm_actor_utils/src/receiver/mod.rs	74.19% <ø> (ø)
...s/actors/frc46_factory_token/token_impl/src/lib.rs	76.71% <ø> (ø)

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