RFR: 8357506: [JVMCI] Consolidate eager JVMCI initialization code [v2]

[Doug Simon]

On Thu, 22 May 2025 17:24:08 GMT, Doug Simon <dnsimon at openjdk.org> wrote:

>> While working on [JDK-8357135](https://bugs.openjdk.org/browse/JDK-8357135), I was reminded that some of the code implementing eager JVMCI compiler initialization (i.e. `-XX:+EagerJVMCI`) is in helper methods such as `JVMCIRuntime::call_getCompiler` that sound general purpose but are only used for eager JVMCI compiler initialization. This PR inlines `JVMCIRuntime::call_getCompiler` and renames `JVMCI::initialize_compiler` to `initialize_compiler_in_create_vm` to make its single use case clearer.
>
> Doug Simon has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:
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>   consolidate JVMCI eager initialization

Thanks for the reviews.

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PR Comment: https://git.openjdk.org/jdk/pull/25369#issuecomment-2903410300