RFR: 8342577: Clean up JVMTI breakpoint support

[Serguei Spitsyn]

On Thu, 24 Oct 2024 01:42:36 GMT, Alex Menkov <amenkov at openjdk.org> wrote:

> The fix cleans up code to support list of JVMTI breakpoints.
> - classes required to supports cache of byte code pointers (GrowableElement, GrowableCache, JvmtiBreakpointCache) are dropped;
> - class JvmtiCurrentBreakpoints (JvmtiBreakpoints factory) is left as is, dropped unused code;
> - fixed race in JvmtiCurrentBreakpoints::get_jvmti_breakpoints() (fix for JDK-8210637);
> - JvmtiBreakpoint:JvmtiBreakpoint() + JvmtiBreakpoint::copy(JvmtiBreakpoint& bp) are replaced with copy ctor;
> - JvmtiBreakpoints::clearall_in_class_at_safepoint() is simplified to do a single pass;
> 
> Testing: tier1..tier6

Looks good.

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Marked as reviewed by sspitsyn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/21675#pullrequestreview-2414941187