Apply baggage limits

[jack-berg]

Apply w3c baggage spec limits when extracting and injecting baggage: https://www.w3.org/TR/baggage/#limits

• Max number of entries: 64
• Max total length of all entries: 8192

Also apply same limits to baggage from JaegerPropagator, OtTracePropagator.

[codecov]

Codecov Report

❌ Patch coverage is 86.66667% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.83%. Comparing base (2fe0a14) to head (cbadf0e).
⚠️ Report is 31 commits behind head on main.

Files with missing lines	Patch %	Lines
.../extension/trace/propagation/JaegerPropagator.java	83.33%	3 Missing and 3 partials ⚠️
.../opentelemetry/api/baggage/propagation/Parser.java	75.00%	1 Missing and 1 partial ⚠️
.../api/baggage/propagation/W3CBaggagePropagator.java	92.59%	0 Missing and 2 partials ⚠️
...extension/trace/propagation/OtTracePropagator.java	89.47%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #8380      +/-   ##
============================================
+ Coverage     90.30%   90.83%   +0.52%     
- Complexity     7723     7982     +259     
============================================
  Files           850      898      +48     
  Lines         23256    24115     +859     
  Branches       2363     2412      +49     
============================================
+ Hits          21002    21904     +902     
+ Misses         1528     1462      -66     
- Partials        726      749      +23     

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[jsuereth]

Fix LGTM - had two comments - one of possible better protection (i.e. not wasting CPUs parsing degenerate baggage headers that fit within byte limit), the other for more flexible protection.

[trask]

(elevating @jsuereth's approval)