Split hash provider into separate state and block hash dbs

[matejmode]

Description

This PR splits hash provider into separate state hash and block hash databases.

Type of change

• Refactoring (changes that do NOT affect functionality)

[codecov]

Codecov Report

❌ Patch coverage is 88.42975% with 14 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
db/block_hash_db.go	85.50%	5 Missing and 5 partials ⚠️
db/state_hash_db.go	92.30%	2 Missing and 2 partials ⚠️

Files with missing lines	Coverage Δ
db/state_hash_db.go	92.30% <92.30%> (ø)
db/block_hash_db.go	85.50% <85.50%> (ø)

... and 1 file with indirect coverage changes

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