Bump tar and @microsoft/vscode-azext-dev

Bumps [tar](https://github.com/isaacs/node-tar) and [@microsoft/vscode-azext-dev](https://github.com/Microsoft/vscode-azuretools). These dependencies needed to be updated together.

Updates `tar` from 6.2.1 to 7.5.3
- [Release notes](https://github.com/isaacs/node-tar/releases)
- [Changelog](https://github.com/isaacs/node-tar/blob/main/CHANGELOG.md)
- [Commits](isaacs/node-tar@v6.2.1...v7.5.3)

Updates `@microsoft/vscode-azext-dev` from 2.1.0 to 2.1.2
- [Release notes](https://github.com/Microsoft/vscode-azuretools/releases)
- [Commits](https://github.com/Microsoft/vscode-azuretools/commits)

---
updated-dependencies:
- dependency-name: tar
  dependency-version: 7.5.3
  dependency-type: direct:production
- dependency-name: "@microsoft/vscode-azext-dev"
  dependency-version: 2.1.2
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]