chore(deps): bump tar, @microsoft/sp-build-web and @microsoft/sp-webpart-workbench

Removes [tar](https://github.com/isaacs/node-tar). It's no longer used after updating ancestor dependencies [tar](https://github.com/isaacs/node-tar), [@microsoft/sp-build-web](http://aka.ms/spfx) and [@microsoft/sp-webpart-workbench](http://aka.ms/spfx). These dependencies need to be updated together.


Removes `tar`

Updates `@microsoft/sp-build-web` from 1.18.2 to 1.22.2

Updates `@microsoft/sp-webpart-workbench` from 1.10.0 to 1.12.0

---
updated-dependencies:
- dependency-name: tar
  dependency-version: 
  dependency-type: indirect
- dependency-name: "@microsoft/sp-build-web"
  dependency-version: 1.22.2
  dependency-type: direct:development
- dependency-name: "@microsoft/sp-webpart-workbench"
  dependency-version: 1.12.0
  dependency-type: direct:development
...

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Author: dependabot[bot]