[Data] Allow a configurable thread pool size for DataStore

[tylerjroach]

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• I have searched for duplicate or closed issues and discussions.

Language and Async Model

Java, Kotlin

Amplify Categories

DataStore

Gradle script dependencies

All versions of DataStore

Environment information

All versions of DataStore

Please include any relevant guides or documentation you're referencing

No response

Describe the feature request

SQLiteStorageAdapter spawns a thread pool size of 20 x number of processors. This is likely excessive, especially for devices that may have a large number of cpu cores, but low RAM.

DataStore's overall Thread Pool size could be made to be easily configurable, similar to how syncMaxConcurrentModels was implemented.

Initialization steps (if applicable)

No response

Code Snippet

// Put your code below this line.

Configuration File

No response

GraphQL Schema

// Put your schema below this line

Additional information and screenshots

No response

[github-actions]

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