refactor(trie2): use more descriptive felt.Hash type instead of felt.Felt

[MaksymMalicki]

This PR addresses #3282 (comment), and uses more descriptive felt.Hash type for trie node hash fields and felt.StateRootHash for all the state root hash fields in all triedb and trie2 packages

[codecov]

Codecov Report

❌ Patch coverage is 68.49315% with 46 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.10%. Comparing base (55cfeb3) to head (275a9f2).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
core/trie2/trie.go	28.57%	20 Missing ⚠️
core/felt/hash.go	33.33%	8 Missing ⚠️
core/trie2/trieutils/id.go	75.00%	6 Missing ⚠️
core/trie2/triedb/pathdb/journal.go	37.50%	5 Missing ⚠️
core/trie2/databasetest.go	70.00%	3 Missing ⚠️
core/trie2/trieutils/accessors.go	33.33%	2 Missing ⚠️
core/trie2/triedb/hashdb/database.go	94.11%	1 Missing ⚠️
core/trie2/triedb/rawdb/database.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3316      +/-   ##
==========================================
+ Coverage   76.09%   76.10%   +0.01%     
==========================================
  Files         347      347              
  Lines       32769    32829      +60     
==========================================
+ Hits        24934    24983      +49     
- Misses       6045     6060      +15     
+ Partials     1790     1786       -4     

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[EgeCaner]

Looks good!