[Task]: Create test artifacts for dead code elimination

[heshanpadmasiri]

Description

• Update Implement dead code elimination  #43112 to match master and add it's changes to the ballerina-lang:feature-codegen-optimizer branch
• Create a time stamp version using that branch

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-> Compilation

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[heshanpadmasiri]

Closing this since we have done the initial testing with these artificats, and decided to temperarily hold the optimization until certain bugs are resolved.