fix: left pad jaeger trace ids

[dyladan]

Fixes #742

[codecov-io]

Codecov Report

Merging #743 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master    #743      +/-   ##
=========================================
+ Coverage   92.68%   92.7%   +0.01%     
=========================================
  Files         227     227              
  Lines       10366   10385      +19     
  Branches      929     930       +1     
=========================================
+ Hits         9608    9627      +19     
  Misses        758     758

Impacted Files	Coverage Δ
...ges/opentelemetry-exporter-jaeger/src/transform.ts	100% <100%> (ø)	⬆️
...entelemetry-exporter-jaeger/test/transform.test.ts	100% <100%> (ø)	⬆️
...y-tracing/test/export/InMemorySpanExporter.test.ts	100% <0%> (ø)	⬆️
...kages/opentelemetry-metrics/test/mocks/Exporter.ts	66.66% <0%> (-33.34%)	⬇️
...kages/opentelemetry-plugin-dns/test/utils/utils.ts	33.33% <0%> (-26.67%)	⬇️
...ages/opentelemetry-plugin-http/test/utils/utils.ts	33.33% <0%> (-26.67%)	⬇️
packages/opentelemetry-tracing/src/utility.ts	100% <0%> (ø)	⬆️
...es/opentelemetry-node/src/instrumentation/utils.ts	100% <0%> (+9.52%)	⬆️
...s/opentelemetry-tracing/src/BasicTracerRegistry.ts	100% <0%> (ø)	⬆️
... and 117 more

[OlivierAlbertini]

LGTM

[mayurkale22]

lgtm, I remember same thing we did in OC.

[dyladan]

@open-telemetry/javascript-approvers can I get a few more ✅ on this?