fix: check for Blob before creating worker URL (close #4462)

[andreasg123]

Description

Fixes #4462

With server-side rendering, in my case Next.js, Blob isn't defined in Node.js. That causes the generated output for web workers to fail. This adds a check for the availability of Blob to the generated code. In its absence, the previous approach is being used. The concatenation of a long string introduces a slight inefficiency. However, I'm happy that things work again and the function WorkerWrapper may not even be called.

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

I'm not really sure how to test this but I'm open to suggestions.

[Shinigami92]

Can we implement a test for the new behavior that fails without the change?

[andreasg123]

I adapted the test from #3468 that introduced the use of Blob for creating a worker.

[andreasg123]

Could you please tell me if this is scheduled to be merged and released? It would really help with the issue that I have with using the current version of https://github.com/hms-dbmi/viv