Use async_fs instead of LocalFileSystem in java bindings for local files

[robert3005]

Found this crate and I think it's a bit more ergonomic than object_store for
local files

[codspeed-hq]

Merging this PR will degrade performance by 24.72%

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

❌ 6 regressed benchmarks
✅ 1204 untouched benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	new_bp_prim_test_between[i16, 32768]	121 µs	135 µs	-10.35%
❌	Simulation	new_bp_prim_test_between[i32, 16384]	95.5 µs	109.9 µs	-13.09%
❌	Simulation	new_bp_prim_test_between[i32, 32768]	141.8 µs	170.7 µs	-16.93%
❌	Simulation	new_alp_prim_test_between[f64, 16384]	127.8 µs	149.7 µs	-14.61%
❌	Simulation	new_bp_prim_test_between[i64, 32768]	178.9 µs	237.6 µs	-24.72%
❌	Simulation	new_bp_prim_test_between[i64, 16384]	116 µs	145.3 µs	-20.19%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing rk/javalocalfs (b57bfe3) with develop (e56c80d)}