RDKB-64619 Fix PR0270(BPI connectivity) failure on first iteration

[pavithrasundaravadivel]

Impacted Platforms:
All RDKB Platforms

Reason for change: Enter into proper namespace for iperf tests

Test Procedure: Run PR0270 testcase and check the status

Risks: None

Priority: P1

Signed-off-by:Pavithra_Sundaravadivel@comcast.com

[Copilot]

Pull request overview

Fixes PR0270 (BPI connectivity) first-iteration failures by ensuring iperf steps correctly enter/leave the expected Linux network namespace and improving cleanup behavior when failures occur.

Changes:

• Ensure leave_namespace() is invoked on iperf start-command failure paths (client/server) to avoid leaving the process in the wrong netns.
• Add a fallback cleanup path for iperf stop steps that cannot resolve the referenced start step (attempts to terminate iperf3 via killall).
• Update the OpenWrt build makefile to include additional hostap sources and enable CONFIG_AP.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

File	Description
src/external_agent_cci/wlan_ext_emu.cpp	Adds cleanup of the test object/message manager when the agent enters a fail state.
src/external_agent_cci/wlan_ext_emu_test_step_param_iperf_server.cpp	Adds namespace cleanup on error; adds fallback stop behavior using killall.
src/external_agent_cci/wlan_ext_emu_test_step_param_iperf_client.cpp	Same as server: improved namespace cleanup on error; fallback stop behavior using killall.
build/openwrt/makefile	Adds hostap sources/flags (including CONFIG_AP) to the OpenWrt build.

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