feat: allow full control on rocksdb db opening

[yihuang]

this API was previously supported in cometbft-db and used by us to support multiple processes reading from the same db concurrently.

Summary by CodeRabbit

• New Features
  • Introduced a feature for enhanced control over RocksDB initialization.
• Refactor
  • Updated random number generation to use secure methods in tests.
  • Improved RocksDB construction process for consistency and flexibility.

[coderabbitai]

Walkthrough

The recent update enhances user control over RocksDB instance initialization, offering extensive customization options. This improvement focuses on the rocksdb.go file, providing users with increased flexibility and customization capabilities for creating RocksDB instances.

Changes

File(s)	Change Summary
CHANGELOG.md rocksdb.go	Added a new feature in the unreleased version to allow full control in RocksDB opening. Modified NewRocksDBWithOptions to return NewRocksDBWithRawDB instead of NewRocksDBWithRaw, introducing NewRocksDBWithRawDB for full control over DB instance construction.
prefixdb_test.go	Replaced math/rand with crypto/rand for secure random number generation in prefixdb_test.go.

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[coderabbitai]

Consider rephrasing to enhance clarity and correct the spelling mistake.

- * Allow full control in rocksdb opening
+ * Allow full control over RocksDB opening

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Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation.

Suggested change

	* Allow full control in rocksdb opening
	* Allow full control over RocksDB opening