fix: local build.rs not running on changes

[ChaoticTempest]

This fixes local build.rs script not running correctly due to changed folder structure. Also moved crypto-shared folder into chain-signatures since that would be annoying later to deal with.

[ailisp]

will this result multiple rerun if more than one dir changes?

[ChaoticTempest]

This build script only gets ran when you build the integration-tests package, so it'll only be ran once. The rerun_directory just has it listens to specific timestamps for a list of directories, and if any of them changes, it'll trigger a rebuild the next time we go to build this test package

[ailisp]

LGTM!

[github-actions]

Terraform Feature Environment Destroy (dev-625)

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Pusher: @ChaoticTempest, Action: pull_request, Working Directory: ``, Workflow: Terraform Feature Env (Destroy)