feat: expose sessionId in debugger module

[deepak1556]

Description of Change

Fixes #24168

Checklist

• PR description included and stakeholders cc'd
• npm test passes
• tests are changed or added
• relevant documentation is changed or added
• PR title follows semantic commit guidelines
• PR release notes describe the change in a way relevant to app developers, and are capitalized, punctuated, and past tense.
• This is NOT A BREAKING CHANGE. Breaking changes may not be merged to master until 11-x-y is branched.

Release Notes

Notes: expose sessionId associated with a target from debugger module

[jkleinsc]

@electron/wg-api reviewed and approved this at our June 29, 2020 meeting

[codebytere]

(removing label as that label goes on the backports themselves ☝🏻)

[deepak1556]

Approval ping :)

[nornagon]

This is semver/minor, yes?

[deepak1556]

yup thats right, will mark the backports. Thanks!

[release-clerk]

Release Notes Persisted

expose sessionId associated with a target from debugger module

[trop]

I was unable to backport this PR to "8-x-y" cleanly;
you will need to perform this backport manually.

[trop]

I have automatically backported this PR to "10-x-y", please check out #24397

[trop]

I have automatically backported this PR to "9-x-y", please check out #24398

[trop]

@deepak1556 has manually backported this PR to "8-x-y", please check out #24399