Remove usage of Base internals (permute!!)

[LilithHafner]

permute!! and invpermute!! are internal functions of Base and are likely to be removed soon. This PR makes it so that if they are gone, PooledArrays will still compile.

AFAICT, nobody uses these methods anyway, so deleting them would work too, but this approach has a more minimal impact.

[bkamins]

I would just remove them.

@nalimilan, @quinnj - what do you think?

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +1.57% 🎉

Comparison is base (1bb9c95) 87.97% compared to head (762875c) 89.55%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #87      +/-   ##
==========================================
+ Coverage   87.97%   89.55%   +1.57%     
==========================================
  Files           1        1              
  Lines         341      335       -6     
==========================================
  Hits          300      300              
+ Misses         41       35       -6     

Files Changed	Coverage Δ
src/PooledArrays.jl	89.55% <ø> (+1.57%)	⬆️

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[nalimilan]

If they are removed from Base I agree we can just drop them.

[nalimilan]

Thanks. Let's just wait for the decision in Julia then.

[LilithHafner]

I was holding off on merging the Base PR until after this to avoid transient breakage. If you are not willing to delete these methods until the Base PR merges, then we can revert this PR to 94beed6 which should be pretty uncontroversial. FWIW, I am not aware of any packages that call the methods this PR removes.

[nalimilan]

OK, I thought that the PR was still being discussed in Julia. If all that's blocking it is PRs in packages let's merge this.

[LilithHafner]

bump

[bkamins]

@LilithHafner - do you need a release. If yes - can you please bump the version of the package to 1.4.3 in this PR and then I can merge it and make a release.

[LilithHafner]

Yes, I do need a release, thank you.