Deprecated Processor interface and moved to own package

[MovieStoreGuy]

Helping contribute to #2273

[codecov]

Codecov Report

Merging #2326 (79df271) into main (0f0bd26) will decrease coverage by 0.0%.
The diff coverage is n/a.

❗ Current head 79df271 differs from pull request most recent head e64c386. Consider uploading reports for the commit e64c386 to get more accurate results

@@           Coverage Diff           @@
##            main   #2326     +/-   ##
=======================================
- Coverage   73.6%   73.6%   -0.1%     
=======================================
  Files        175     175             
  Lines      12409   12409             
=======================================
- Hits        9137    9134      -3     
- Misses      3039    3041      +2     
- Partials     233     234      +1     

Impacted Files	Coverage Δ
sdk/export/metric/metric.go	0.0% <ø> (ø)
...s/otlp/otlptrace/internal/connection/connection.go	14.6% <0.0%> (-1.6%)	⬇️

[MrAlias]

Overall this change set looks good. Only minor issues to address.

[MrAlias]

Can we remove this change? It looks like it is reverting #2316.

I'm guessing the tooling automatically did this and we should look into not having it clear this.

[MovieStoreGuy]

@jmacd I've notice and issue is doing via smaller deprecations means doing an odd alias back to package I am trying to deprecate.

As much as I thought it made sense to do smaller cuts and deprecations, I think it has to be done within the one change in order to avoid situations are trying to alias the would be deprecated package in the packages the types are moving to.

I am gonna close off the smaller PRs and do it in one clean sweep