Add Operation State API

[zbirenbaum]

Description

Introduces nativelink-state and operation_state_manager API

Checklist

• Updated documentation if needed
• Tests added/amended
• bazel test //... passes locally
• PR is contained in a single commit, using git amend see some docs

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This change is 

[CLAassistant]

All committers have signed the CLA.

[MarcusSorealheis]

What a massive PR

[zbirenbaum]

What a massive PR

It’s on top of a second one. Blaise wanted me to do it this way and I think its a good idea too. #927 is the bulk of these changes

[adam-singer]

Reviewed 11 of 11 files at r1, 4 of 5 files at r2, all commit messages.
Reviewable status: 0 of 1 LGTMs obtained, and pending CI: windows-2022 / stable

[allada]

Reviewed 7 of 11 files at r1, 3 of 5 files at r2.
Reviewable status: 0 of 1 LGTMs obtained, and pending CI: windows-2022 / stable, and 3 discussions need to be resolved

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-- commits line 16 at r2:
nit: Expand this.

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Cargo.toml line 34 at r2 (raw file):

nativelink-scheduler = { path = "nativelink-scheduler" }
nativelink-service = { path = "nativelink-service" }
nativelink-state = { path = "nativelink-state" }

nit: Don't make this it's own crate, put it under scheduler for now.

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nativelink-state/src/operation_state_manager.rs line 43 at r2 (raw file):

#[async_trait]
pub trait ActionStateResult: Send + Sync + 'static {
    async fn as_state(&self) -> Result<Arc<ActionState>, Error>;

nit: Add documentation to these.

[zbirenbaum]

Reviewable status: 0 of 1 LGTMs obtained, and pending CI: Vercel, pre-commit-checks

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-- commits line 16 at r2:

Previously, allada (Nathan (Blaise) Bruer) wrote…

nit: Expand this.

Done.

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Cargo.toml line 34 at r2 (raw file):

Previously, allada (Nathan (Blaise) Bruer) wrote…

nit: Don't make this it's own crate, put it under scheduler for now.

Done.

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nativelink-state/src/operation_state_manager.rs line 43 at r2 (raw file):

Previously, allada (Nathan (Blaise) Bruer) wrote…

nit: Add documentation to these.

Done.

[allada]

Reviewed 8 of 8 files at r4, all commit messages.
Reviewable status: complete! 1 of 1 LGTMs obtained