8390807: Reduce run time of test AOTCodeFlags.java

[iklam]

This test runs JavacBench 16 times so it takes long time to finish.

This PR tries to replace the test app with a smaller program, but run with -Xbatch and use a large enough number of iterations to ensure that C1/C2 stubs are generated.

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Progress

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Issue

• JDK-8390807: Reduce run time of test AOTCodeFlags.java (Enhancement - P4)

Reviewers

• Vladimir Kozlov (@vnkozlov - Reviewer)

Reviewing

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[mlbridge]

Webrevs

• 01: Full - Incremental (63669a25)
• 00: Full (6a42c12b)

[vnkozlov]

Good. Thank you for doing it.

[iklam]

In #30660 (comment) , @vnkozlov tested with the "HelloWorldApp" and saw failures when running with tier1,tier2,tier3,hs-comp-stress

With this PR, I reran the same tiers and all tests passed.So it looks like it's safe to use "AOTCodeSimpleTestApp".