This adds avoid_dynamic_calls to the list of lints, and fixes all instances where it was violated.

Importantly, this lint is NOT turned on for flutter/packages/test, because those changes are happening in another PR: #84478

This adds a "three point" cubic curve that combines two cubic curves into one curve, where the control points are all in the same coordinate system. It's called "three point" because it incorporates a middle point that the curve runs through, and that point is in addition to the existing implicit (0,0) and (1,1) points that a Curve already has.

I also added an example of this curve, which is just a more emphasized version of the easeInOutCubic.

Update samples to use repo analysis options, Fix sample templates and a ton of analyzer issues (#77868)

[flutter] throw more specific error messages if a lerp'd type does not conform to Tween API (#74684)

Fix the duration assertion error for the _animateToInternal method and refine the error description (#71137)

* enable null_check_on_nullable_type_parameter and tighten_type_of_initializing_formals

* fix CI

* Add punctuation for unterminated sentences in doc comments

* Addressing review nit

* migrate animation to nullsafety

* nullable tween

* fix generic type issue

* address review comment

* add language version 2.8 in packages/flutter

* enable non-nullable analyzer flag