feat: optimize construction of outgoing packets

[bdraco]

This is ~27% speed up. We can get some more by optimizing the packing but the bulk of the run time is incoming so its likely not worth the maintenance burden to keep the pxd file in sync unless someone has a use case were they construct many outgoing packets.

[codecov-commenter]

Codecov Report

Base: 99.72% // Head: 99.72% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (5cc30cf) compared to base (919d4d8).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1118   +/-   ##
=======================================
  Coverage   99.72%   99.72%           
=======================================
  Files          22       22           
  Lines        2561     2567    +6     
  Branches      452      454    +2     
=======================================
+ Hits         2554     2560    +6     
  Misses          5        5           
  Partials        2        2           

Impacted Files	Coverage Δ
src/zeroconf/__init__.py	100.00% <100.00%> (ø)
src/zeroconf/_protocol/outgoing.py	100.00% <100.00%> (ø)

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[bdraco]

Remaining high hit branches

[bdraco]

So the first is parsing the incoming message, its much smaller. Not much more we can do there

The rest is handling the question or responses.

Handle response is mostly cache lookups

[bdraco]

Might make sense to do a pxd for the cache so we could make dns_entry_matches a cdef since it's called all over the place

[bdraco]

Might not be worth the effort though as we already met the goal of cutting the base load cpu usage by 50% with this PR getting us over the mark

[bdraco]

While the tests cover this 100%, I left it running overnight on 2 production systems to be sure there weren't any unexpected side effects and everything looks good this morning.