Nearly completely replace the original GitHub actions workflow.
Changes:

- Move from `.sh` files in `ci/steps` to steps in the workflow.
- Move from using docker images for environment to manual setup.
- Upgrade nfpm to v2.3.1

BREAKING CHANGE: official arm64 builds no longer support CentOS 7.
If you need to use CentOS 7 on arm64, build `code-server` locally.
For docs, see the yarn/npm section in `docs/install.md`.

chore(deps-dev): bump typescript from 4.2.3 to 4.2.4

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 4.2.3 to 4.2.4.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](https://github.com/Microsoft/TypeScript/commits)
Signed-off-by: Ndependabot[bot] <support@github.com>

chore(deps-dev): bump audit-ci from 3.1.1 to 3.2.0

Bumps [audit-ci](https://github.com/IBM/audit-ci) from 3.1.1 to 3.2.0.
- [Release notes](https://github.com/IBM/audit-ci/releases)
- [Commits](https://github.com/IBM/audit-ci/compare/v3.1.1...v3.2.0)
Signed-off-by: Ndependabot[bot] <support@github.com>

fix: update ranger file

dev(testing): add jest-playwright and reduce flakiness of e2e tests

docs(install): add Termux workaround for search

feat(ci): add audit job for security

chore(deps): limit xdg-basedir updates

chore(deps-dev): bump @typescript-eslint/eslint-plugin from 4.20.0 to 4.21.0

Bumps [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin) from 4.20.0 to 4.21.0.
- [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases)
- [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/CHANGELOG.md)
- [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v4.21.0/packages/eslint-plugin)
Signed-off-by: Ndependabot[bot] <support@github.com>

chore(deps-dev): bump @typescript-eslint/parser from 4.20.0 to 4.21.0

Bumps [@typescript-eslint/parser](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/parser) from 4.20.0 to 4.21.0.
- [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases)
- [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/parser/CHANGELOG.md)
- [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v4.21.0/packages/parser)
Signed-off-by: Ndependabot[bot] <support@github.com>

fix(deps): update and fix vulnerabilities