fix(signals): avoid throwing when in check throws [backport]

[nolanlawson]

Details

Same as #5105 but backport.

Does this pull request introduce a breaking change?

• 😮‍💨 No, it does not introduce a breaking change.

Does this pull request introduce an observable change?

• 🤞 No, it does not introduce an observable change.

[salesforce-nucleus]

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  /nucleus bump-version [version]

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[salesforce-nucleus]

❌ One or More Pre-release Checks Failed

• ⚪️ Check PR user has rights to execute the workflow (skipped)
  Skipping PR owner check since PR has already been merged.

• ✅ Check PR is approved
  PR 5110 is approved

• ⚪️ Check PR is mergeable (skipped)
  PR 5110 has already been merged

• ⚠️ Check GUS reference is present
  PR does not contain a reference to a GUS work item. You can update it any time by including '@W-XXXXXXX' into the title or body of the PR

• ❌ Check no conflicting Github release
  A Github release already exists with a tag of v8.10.1. Please commit/push a version bump to the nolan/fix-signals-backport branch or have Nucleus do it for you by responding with the following comment
  /nucleus bump-version [version]

  To skip this check, run /nucleus release --force

• ❌ Check NPM packages have not been released yet
  Version 8.10.1 of this project has already been published. If you would like to skip NPM publishing, then run /nucleus release --skipNpmRelease.If you want to bump the version in your source branch, run /nucleus bump-version [version]

• ⚪️ Check Maven artifacts have not been released yet (skipped)
  Skipping check since project doesn't deliver Maven artifacts

• ⚪️ Check GAV mapping exists for jar repo (skipped)
  Skipping GAV mapping check because a core jar is not being released.