Create a versioned KernelStateValue which is only partially accessible from user space

[preston-evans98]

Description

This PR makes two related changes:

1. Add a slot_height method to Context. This simple change accounts for almost all of the lines changed
2. Introduce a new KernelStateValue type which appears as a map from slot_number to value when accessed from the kernel, but appears as a regular state value (which may be absent) when accessed from user space. To support this value, two new variants of WorkingSet are introduced - a KernelWorkingSet which can only be constructed by a Kernel, and a VersionedWorkingSet, which is constructed from the context and allows access to only the current version of a Kernel Value.

Testing

Tests have been added to cover the new KernelStateValue's behavior

[codecov]

Codecov Report

Merging #1163 (029cf03) into nightly (b29e9c2) will decrease coverage by 0.7%.
The diff coverage is 50.1%.

❗ Current head 029cf03 differs from pull request most recent head 114cae4. Consider uploading reports for the commit 114cae4 to get more accurate results

Additional details and impacted files

Files	Coverage Δ
full-node/sov-sequencer/src/batch_builder.rs	96.9% <100.0%> (+<0.1%)	⬆️
...tions/integration-tests/src/chain_state/helpers.rs	77.2% <ø> (ø)
...m/module-implementations/sov-accounts/src/tests.rs	99.4% <100.0%> (ø)
...mplementations/sov-attester-incentives/src/call.rs	86.8% <100.0%> (-0.2%)	⬇️
...plementations/sov-blob-storage/src/capabilities.rs	87.7% <ø> (ø)
...implementations/sov-prover-incentives/src/tests.rs	100.0% <100.0%> (ø)
...odule-system/sov-modules-api/src/containers/mod.rs	100.0% <ø> (ø)
module-system/sov-modules-api/src/lib.rs	97.6% <ø> (ø)
...ule-system/sov-modules-rollup-blueprint/src/lib.rs	91.9% <ø> (ø)
module-system/sov-modules-stf-blueprint/src/lib.rs	89.8% <ø> (ø)
... and 6 more

... and 15 files with indirect coverage changes