Add instances for the standard library's TailRec

[travisbrown]

This takes @johnynek's commits from #3041 and adds one commit changing the val in TailRecInstances to a method pointing to a cached instance, to avoid breaking bincompat.

[codecov-io]

Codecov Report

Merging #3127 into master will decrease coverage by 0.32%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #3127      +/-   ##
==========================================
- Coverage   93.57%   93.24%   -0.33%     
==========================================
  Files         371      376       +5     
  Lines        7097     7300     +203     
  Branches      185      205      +20     
==========================================
+ Hits         6641     6807     +166     
- Misses        456      493      +37

Flag	Coverage Δ
#scala_version_212	93.58% <100%> (ø)	⬆️
#scala_version_213	90.88% <100%> (?)

Impacted Files	Coverage Δ
core/src/main/scala/cats/Eval.scala	98.83% <100%> (+0.01%)	⬆️
core/src/main/scala/cats/instances/tailrec.scala	100% <100%> (ø)
...e/src/main/scala-2.13+/cats/data/ZipLazyList.scala	77.77% <0%> (ø)
...src/main/scala-2.13+/cats/instances/lazyList.scala	100% <0%> (ø)
....13+/cats/kernel/instances/LazyListInstances.scala	100% <0%> (ø)
.../main/scala-2.13+/cats/data/NonEmptyLazyList.scala	62.5% <0%> (ø)
...in/scala/cats/data/AbstractNonEmptyInstances.scala	100% <0%> (+3.44%)	⬆️

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[travisbrown]

Updated branch in #3041.