Allow pascal-case imports and disable consistent-generic-constructors

[m-akinc]

Found two rules causing new, unwanted violations in the Nimble repo:

• @typescript-eslint/consistent-generic-constructors results in code like this:

  private readonly hiddenOptions: Set<ListOption> = new Set();
  

  reporting violations like "The generic type arguments should be specified as part of the constructor type arguments". I had tried to disable this in the prior PR, but was doing so from the wrong config.

• @typescript-eslint/naming-convention now covers imported namespaces (e.g. import * as Foo from '../foo'), and it defaults to allowing both camel and pascal case. However, because we are configuring the 'default' selector (which matches anything not otherwise specified) to only allow camel case, it was disallowing pascal case for those imported namespaces.

[jattasNI]

@rajsite @TrevorKarjanis bypassing you on this one since it's fairly minor bug-level config changes but feel free to leave feedback after the PR completes and Mert can address it in a follow-up.