Fix output name of qpg_executable OTA (#17786)
Fix output name of qpg_executable OTA (#17786)

This always builds because it uses the wrong filename:

ninja: Entering directory `out/debug'
ninja explain: output build.ninja older than most recent input ../../third_party/connectedhomeip/third_party/qpg_sdk/qpg_executable.gni (1651007143800012937 vs 1651007267243517127)
[0/1] Regenerating ninja files
ninja explain: output lock_app.out.ota doesn't exist
ninja explain: lock_app.out.ota is dirty
[1/2] ACTION //:lock_app.out.ota(//third_party/connectedhomeip/build/toolchain/arm_gcc:arm_gcc)

Fix the filename (and squelch the output).
nestlabs/connectedhomeip,nestlabs/connectedhomeip,nestlabs/connectedhomeip,project-chip/connectedhomeip,project-chip/connectedhomeip,nestlabs/connectedhomeip,project-chip/connectedhomeip,project-chip/connectedhomeip,nestlabs/connectedhomeip,project-chip/connectedhomeip,nestlabs/connectedhomeip,nestlabs/connectedhomeip,project-chip/connectedhomeip