[EC-154] [BEEEP] Remove factory providers in Angular DI

[eliykat]

Type of change

• [ ] Bug fix
• [ ] New feature development
• [x] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
• [ ] Build/deploy pipeline (DevOps)
• [ ] Other

Objective

See https://github.com/bitwarden/jslib/pull/775.

Code changes

• update services.module.ts to use the new tokens
• extract init logic to an initService so that it's not mixed in with provider logic
• add @Injectable() to WebPlatformUtilsService so that we don't have to specify its deps. I was a little unsure about mixing patterns/approaches, but I settled on making use of Angular's features where we can.

Screenshots

Testing requirements

Before you submit

• [x] I have checked for linting errors (npm run lint) (required)
• [ ] This change requires a documentation update (notify the documentation team)
• [ ] This change has particular deployment requirements (notify the DevOps team)

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