wire: use quicvarint.Parse to when parsing transport parameters

[marten-seemann]

With quicvarint.Parse (#4475) we can now parse the transport parameter's varints without allocating a bytes.Reader.

Part of #3663.

name                                              old time/op    new time/op    delta
TransportParameters/without_preferred_address-16     664ns ± 2%     537ns ± 3%  -19.04%  (p=0.000 n=9+9)
TransportParameters/with_preferred_address-16        795ns ± 3%     599ns ± 3%  -24.70%  (p=0.000 n=10+10)

name                                              old alloc/op   new alloc/op   delta
TransportParameters/without_preferred_address-16      720B ± 0%      600B ± 0%  -16.67%  (p=0.000 n=10+10)
TransportParameters/with_preferred_address-16         880B ± 0%      712B ± 0%  -19.09%  (p=0.000 n=10+10)

name                                              old allocs/op  new allocs/op  delta
TransportParameters/without_preferred_address-16      14.0 ± 0%      10.0 ± 0%  -28.57%  (p=0.000 n=10+10)
TransportParameters/with_preferred_address-16         18.0 ± 0%      11.0 ± 0%  -38.89%  (p=0.000 n=10+10)

[codecov]

Codecov Report

Attention: Patch coverage is 75.67568% with 18 lines in your changes are missing coverage. Please review.

Project coverage is 85.31%. Comparing base (a5adbd4) to head (0e6c728).
Report is 4 commits behind head on master.

Files	Patch %	Lines
internal/wire/transport_parameters.go	72.58%	10 Missing and 7 partials ⚠️
internal/handshake/crypto_setup.go	83.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4482      +/-   ##
==========================================
+ Coverage   84.92%   85.31%   +0.39%     
==========================================
  Files         154      154              
  Lines       14676    14846     +170     
==========================================
+ Hits        12463    12665     +202     
+ Misses       1700     1677      -23     
+ Partials      513      504       -9     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.