[CLD-1916]: feat(solana): port MaybeLoadMCMSWithTimelockState

[graham-chainlink]

Bring over MaybeLoadMCMSWithTimelockState from chainlink repo

JIRA: https://smartcontract-it.atlassian.net/browse/CLD-1916

[Copilot]

Pull request overview

Ports Solana support for loading MCMS+Timelock deployment state across multiple chain selectors, aligning this repo’s Solana family helpers with the upstream Chainlink implementation.

Changes:

• Added MaybeLoadMCMSWithTimelockState(env, chainSelectors) to load Solana MCMS+Timelock state per chain selector from the datastore.
• Added unit tests covering empty inputs, multi-chain isolation, and invalid address error wrapping.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
pkg/family/solana/state.go	Introduces the multi-chain state loader that iterates selectors and delegates to the existing per-chain loader.
pkg/family/solana/state_test.go	Adds test coverage for the new multi-chain loader and a local test environment helper.

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[Copilot]

Pull request overview

Ports MaybeLoadMCMSWithTimelockState into the Solana family state helpers so callers can load MCMS+Timelock bindings for multiple Solana chain selectors from the environment datastore.

Changes:

• Added MaybeLoadMCMSWithTimelockState(env, chainSelectors) to load per-chain Solana MCMS+Timelock state from datastore address refs.
• Added unit tests covering empty input, per-chain isolation, and wrapped error behavior on invalid addresses.
• Added a small Solana test environment helper for constructing a cldf.Environment with an in-memory datastore.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
pkg/family/solana/state.go	Adds multi-chain-selector state loader wrapper around MaybeLoadMCMSWithTimelockChainState.
pkg/family/solana/state_test.go	Adds tests for the new multi-chain loader and a helper to build a minimal Solana test environment.

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[Copilot]

Pull request overview

Ports Solana MCMS-with-Timelock state-loading helpers (and supporting accessors) into this repo to load per-chain Solana deployment state from the datastore.

Changes:

• Added MaybeLoadMCMSWithTimelockState to load MCMSWithTimelockState for multiple Solana chain selectors.
• Added MCMSWithTimelockPrograms helpers (GetStateFromType, SetState, RoleAccount) to read/write program/seed/account state by contract/role type.
• Added comprehensive unit tests covering multi-chain loading and the new helper methods.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
pkg/family/solana/state.go	Adds multi-chain state loader and new MCMSWithTimelockPrograms helper methods.
pkg/family/solana/state_test.go	Adds tests for the new multi-chain loader and the helper methods.

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