fix: consistent file_id across installation paths

[guipublic]

Description

Problem*

Resolves an issue where monomorphisation hash differ between compilations from different installation folders

Summary*

The file id are given by iterating over Noir source folders, but the iteration may depend on the file system state.
To fix this, I simply enumerate files in file names order.

Additional Context

Documentation*

Check one:

• No documentation needed.
• Documentation included in this PR.
• [For Experimental Features] Documentation to be submitted in a separate PR.

PR Checklist*

• I have tested the changes locally.
• I have formatted the changes with Prettier and/or cargo fmt on default settings.

[github-actions]

Peak Memory Sample

Program	Peak Memory
keccak256	78.48M
workspace	123.76M
regression_4709	422.91M
ram_blowup_regression	1.58G
private-kernel-tail	201.61M
private-kernel-reset	716.87M
private-kernel-inner	291.68M
parity-root	171.93M

[github-actions]

Execution Sample

Program	Execution Time	%
sha256_regression	0.618s	0%
regression_4709	0.397s	4%
ram_blowup_regression	4.434s	0%
rollup-base-public	21.410s	1%
rollup-base-private	19.358s	-1%
private-kernel-tail	0.678s	-4%
private-kernel-reset	1.457s	-2%
private-kernel-inner	1.035s	5%
parity-root	0.529s	-1%

[github-actions]

Compilation Sample

Program	Compilation Time	%
sha256_regression	1.342s	1%
regression_4709	0.778s	0%
ram_blowup_regression	15.366s	1%
rollup-base-public	114.469s	2%
rollup-base-private	98.535s	0%
private-kernel-tail	1.058s	2%
private-kernel-reset	7.253s	-1%
private-kernel-inner	2.371s	9%
parity-root	0.775s	-2%
noir-contracts	86.293s	0%