refactor(levm): move restore_cache_state() to gen_db.rs

[DiegoCivi]

Motivation

Declutter vm.rs

Description

The function restore_cache_state() was moved to gen_db.rs where it makes more sense.

Closes #2728

[github-actions]

Lines of code report

Total lines added: 21
Total lines removed: 17
Total lines changed: 38

Detailed view

+----------------------------------------+-------+------+
| File                                   | Lines | Diff |
+----------------------------------------+-------+------+
| ethrex/crates/vm/levm/src/db/gen_db.rs | 221   | +21  |
+----------------------------------------+-------+------+
| ethrex/crates/vm/levm/src/vm.rs        | 409   | -17  |
+----------------------------------------+-------+------+

[github-actions]

Benchmark Results Comparison

PR Results

Benchmark Results: Factorial

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
revm_Factorial	246.1 ± 6.6	241.1	259.1	1.00
levm_Factorial	825.5 ± 7.1	816.4	838.3	3.35 ± 0.09

Benchmark Results: Factorial - Recursive

Command	Mean [s]	Min [s]	Max [s]	Relative
revm_FactorialRecursive	1.554 ± 0.095	1.434	1.683	1.00
levm_FactorialRecursive	12.956 ± 0.087	12.887	13.182	8.33 ± 0.51

Benchmark Results: Fibonacci

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
revm_Fibonacci	215.2 ± 0.6	214.4	216.3	1.00
levm_Fibonacci	821.8 ± 8.0	812.6	836.4	3.82 ± 0.04

Benchmark Results: ManyHashes

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
revm_ManyHashes	8.8 ± 0.0	8.7	8.9	1.00
levm_ManyHashes	17.1 ± 0.1	17.0	17.3	1.95 ± 0.01

Benchmark Results: BubbleSort

Command	Mean [s]	Min [s]	Max [s]	Relative
revm_BubbleSort	3.261 ± 0.016	3.239	3.282	1.00
levm_BubbleSort	5.599 ± 0.197	5.497	6.154	1.72 ± 0.06

Benchmark Results: ERC20 - Transfer

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
revm_ERC20Transfer	251.1 ± 4.1	248.6	262.0	1.00
levm_ERC20Transfer	502.8 ± 4.6	497.5	509.5	2.00 ± 0.04

Benchmark Results: ERC20 - Mint

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
revm_ERC20Mint	142.6 ± 0.7	141.6	144.1	1.00
levm_ERC20Mint	325.6 ± 2.6	321.8	330.1	2.28 ± 0.02

Benchmark Results: ERC20 - Approval

Command	Mean [s]	Min [s]	Max [s]	Relative
revm_ERC20Approval	1.031 ± 0.002	1.028	1.033	1.00
levm_ERC20Approval	1.901 ± 0.021	1.875	1.942	1.84 ± 0.02

Main Results

Benchmark Results: Factorial

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
revm_Factorial	240.7 ± 0.6	239.7	241.6	1.00
levm_Factorial	829.2 ± 6.6	820.8	841.6	3.44 ± 0.03

Benchmark Results: Factorial - Recursive

Command	Mean [s]	Min [s]	Max [s]	Relative
revm_FactorialRecursive	1.485 ± 0.070	1.416	1.604	1.00
levm_FactorialRecursive	13.028 ± 0.046	12.945	13.086	8.77 ± 0.42

Benchmark Results: Fibonacci

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
revm_Fibonacci	213.9 ± 5.5	210.1	228.9	1.00
levm_Fibonacci	844.7 ± 33.3	823.4	937.7	3.95 ± 0.19

Benchmark Results: ManyHashes

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
revm_ManyHashes	8.8 ± 0.0	8.7	8.9	1.00
levm_ManyHashes	17.2 ± 0.2	16.9	17.6	1.96 ± 0.03

Benchmark Results: BubbleSort

Command	Mean [s]	Min [s]	Max [s]	Relative
revm_BubbleSort	3.231 ± 0.017	3.214	3.265	1.00
levm_BubbleSort	5.572 ± 0.046	5.523	5.685	1.72 ± 0.02

Benchmark Results: ERC20 - Transfer

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
revm_ERC20Transfer	252.5 ± 4.2	248.5	262.2	1.00
levm_ERC20Transfer	498.3 ± 3.1	495.3	506.3	1.97 ± 0.03

Benchmark Results: ERC20 - Mint

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
revm_ERC20Mint	142.3 ± 1.1	141.2	145.0	1.00
levm_ERC20Mint	322.0 ± 2.0	319.6	325.6	2.26 ± 0.02

Benchmark Results: ERC20 - Approval

Command	Mean [s]	Min [s]	Max [s]	Relative
revm_ERC20Approval	1.045 ± 0.013	1.031	1.070	1.00
levm_ERC20Approval	1.881 ± 0.004	1.873	1.887	1.80 ± 0.02

[JereSalo]

Maybe we could handle everything related to callframe backups in callframe.rs because gen_db.rs in itself is going to big enough so if we can remove some things from there it would be great.
I'd also move there merge_call_frame_backup_with_parent() and those kinds of functions maybe.
Main reason is that gen_db.rs is going to have an addition soon (It's being worked on this PR)