[BUG] chip-tool compilation fails because of response variable

[ericzijian1994]

Reproduction steps

In YAML, I used the saveAs variable in the response to the readEvent as follows:

    - label:
          "TH waits for a report of InterconnectSmokeAlarm attribute from DUT"
      command: "waitForReport"
      attribute: "InterconnectSmokeAlarm"
      response:
          saveAs: tempAlarm

    - label: "TH reads InterconnectSmokeAlarm event from DUT"
      command: "readEvent"
      event: "InterconnectSmokeAlarm"
      response:
          value: { AlarmSeverityLevel: tempAlarm }

Then I compile chip-tool:
./scripts/tools/zap_regen_all.py --type tests
scripts/examples/gn_build_example.sh examples/chip-tool out/chip-tool

Finally I get this error:
ninja_log.txt

Bug prevalence

Always

GitHub hash of the SDK that was being used

78c62b0

Platform

other

Platform Version(s)

No response

Anything else?

No response

[bzbarsky-apple]

Simpler testcase:

    - label: "Read"
      cluster: "Smoke CO Alarm"
      command: "readAttribute"
      attribute: "InterconnectSmokeAlarm"
      response:
          saveAs: tempAlarm

    - label: "Verify"
      cluster: "Smoke CO Alarm"
      command: "readAttribute"
      attribute: "InterconnectSmokeAlarm"
      response:
          value: tempAlarm