[JENKINS-74133] Extract inline JavaScript from AutomateTestAction/summary.jelly

[yaroslavafenkin]

https://issues.jenkins.io/browse/JENKINS-74133

Script in its form before the PR is incorrect, var sessionId = <st:bind value="${session.id}" /> is just wrong and must've never worked. This PR addressed that as well.

Testing done

Manually tested. Mocked the integration layer bits that I needed to get to the screen with violations. Made sure that AutomateTestAction#iframeLoadTime is called when needed.

Before the change
After the change

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