7904107: AgentOut.othervm.ok should not access $(BUILDTESTDIR)/AgentOut.agentvm

[vpa1977]

AgentOut.othervm.ok tries to access $(BUILDTESTDIR)/AgentOut.agentvm. This should only happen in AgentOut.agentvm.ok.
Add a new target to filter log lines that depends on AgentOut.agentvm.ok.

Note: tests pass on retry[1]. The test failure is caused by [2]

[1] https://github.com/vpa1977/jtreg/actions/runs/18863066182
[2] #297

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Issue

• CODETOOLS-7904107: AgentOut.othervm.ok should not access $(BUILDTESTDIR)/AgentOut.agentvm (Bug - P4)

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