New rule: no-implicit-injections

[nelstrom]

With the release of Ember 3.26:

Implicit injection has been deprecated. In particular, the store service from Ember Data must be explicitly injected into controllers and routes if they refer to this.store.

More details in the deprecation guide. We should add a rule that flags up implicit injections.

For the common case of using this.store, it should be pretty straightforward to implement a fixer too.

[nelstrom]

Note that #195 proposes a rule called no-implicit-injections, which sounds similar but the motivation behind it is based on recommended 'best practices', whereas this proposal is based on a deprecation.

[bmish]

Regarding rule naming:

I actually think we should name the rule from #195 no-implicit-service-injection-argument to be more specific about what that is referring to, and then we can name your rule no-implicit-injections to match how the deprecation describes it.

no-implicit-service-injection-argument would be the opposite of the existing rule no-unnecessary-service-injection-argument.

[bmish]

I opened a PR to implement no-implicit-service-injection-argument: #1188