refactor: remove useless code and fix a test

[aeddi]

• Commit 4b6219c move ValidateBlock method from blockExec to state since blockExec.db was an unused parameter. (simplify + remove misleading comment)
• Commit 4f02bcd just removes useless Sprintf found in this package
• Commit c34bfd5 improves ValidateBasic method (adding one more validation test that was marked with a TODO comment)
• Commit df75b32 removes useless case testing the size of a fixed-sized array, see:

  gno/tm2/pkg/crypto/crypto.go

  Lines 24 to 30 in b3800b7

  	const (
  	// AddressSize is the size of a pubkey address.
  	AddressSize = tmhash.TruncatedSize
  	)
  	// (truncated) hash of some preimage (typically of a pubkey).
  	type Address [AddressSize]byte

Contributors' checklist...

• Added new tests, or not needed, or not feasible
• Provided an example (e.g. screenshot) to aid review or the PR is self-explanatory
• Updated the official documentation or not needed
• No breaking changes were made, or a BREAKING CHANGE: xxx message was included in the description
• Added references to related issues and PRs
• Provided any useful hints for running manual tests

[codecov]

Codecov Report

Attention: Patch coverage is 41.17647% with 10 lines in your changes missing coverage. Please review.

Project coverage is 63.80%. Comparing base (7188b1c) to head (e5d9431).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
tm2/pkg/bft/consensus/state.go	14.28%	4 Missing and 2 partials ⚠️
tm2/pkg/bft/types/block.go	60.00%	1 Missing and 1 partial ⚠️
tm2/pkg/bft/consensus/replay.go	0.00%	1 Missing ⚠️
tm2/pkg/bft/state/execution.go	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3159      +/-   ##
==========================================
+ Coverage   63.79%   63.80%   +0.01%     
==========================================
  Files         549      549              
  Lines       78833    78824       -9     
==========================================
+ Hits        50288    50297       +9     
+ Misses      25153    25138      -15     
+ Partials     3392     3389       -3     

Flag	Coverage Δ
contribs/gnodev	61.16% <ø> (ø)
contribs/gnofaucet	15.77% <ø> (+0.94%)	⬆️
gno.land	73.70% <ø> (ø)
gnovm	67.94% <ø> (ø)
misc/genstd	79.72% <ø> (ø)
tm2	62.44% <41.17%> (+0.03%)	⬆️

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[zivkovicmilos]

Looks good 💯