feat(multichain-account-service): add timeout to Solana account creation

[hmalik88]

Explanation

Currently, we don't have an implicit SLA around Solana account creation, so the account creation process can hang and generally degrade the UX. I've added a new property to the SolAccountProviderConfig, createAccounts, which has a timeoutMs property which can be used to timeout Solana account creation. The default for the creation process is 3 seconds, but this can be configured on a per client basis.

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed, highlighting breaking changes as necessary
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes

[montelaidev]

Is there a unit test to test the timeout?

[hmalik88]

Is there a unit test to test the timeout?

We have tests for the timeout itself, but good point I'll add a test for the solana provider itself around createAccounts.