Fix service representation config

[jbertran]

What does this PR do?

Defaults and computation for service representation (mostly peer service flag) were missing tests and had unaccounted for edge cases.

[github-actions]

Overall package size

Self size: 4.91 MB
Deduped: 58 MB
No deduping: 58.1 MB

Dependency sizes

name	version	self size	total size
@datadog/native-iast-taint-tracking	1.5.0	14.86 MB	14.86 MB
@datadog/native-appsec	3.2.0	13.38 MB	13.39 MB
@datadog/pprof	3.1.0	10.66 MB	11.5 MB
protobufjs	7.2.4	2.74 MB	6.52 MB
@datadog/native-iast-rewriter	2.0.1	2.09 MB	2.1 MB
@opentelemetry/core	1.14.0	872.87 kB	1.47 MB
@datadog/native-metrics	2.0.0	898.77 kB	1.3 MB
@opentelemetry/api	1.4.1	780.32 kB	780.32 kB
msgpack-lite	0.1.26	201.16 kB	281.59 kB
opentracing	0.14.7	194.81 kB	194.81 kB
semver	7.5.3	93.39 kB	123.79 kB
@datadog/sketches-js	2.1.0	109.9 kB	109.9 kB
lodash.sortby	4.7.0	75.76 kB	75.76 kB
lru-cache	7.14.0	74.95 kB	74.95 kB
ipaddr.js	2.0.1	59.52 kB	59.52 kB
int64-buffer	0.1.10	49.18 kB	49.18 kB
ignore	5.2.0	48.87 kB	48.87 kB
import-in-the-middle	1.3.5	34.34 kB	38.81 kB
istanbul-lib-coverage	3.2.0	29.34 kB	29.34 kB
retry	0.10.1	27.44 kB	27.44 kB
lodash.uniq	4.5.0	25.01 kB	25.01 kB
limiter	1.1.5	23.17 kB	23.17 kB
lodash.kebabcase	4.1.1	17.75 kB	17.75 kB
lodash.pick	4.4.0	16.33 kB	16.33 kB
node-abort-controller	3.0.1	14.33 kB	14.33 kB
crypto-randomuuid	1.0.0	11.18 kB	11.18 kB
diagnostics_channel	1.1.0	7.07 kB	7.07 kB
path-to-regexp	0.1.7	6.78 kB	6.78 kB
koalas	1.0.2	6.47 kB	6.47 kB
methods	1.1.2	5.29 kB	5.29 kB
module-details-from-path	1.0.3	4.47 kB	4.47 kB

_{🤖 This report was automatically generated by heaviest-objects-in-the-universe}

[codecov]

Codecov Report

Merging #3419 (29ee4f3) into master (66f1fd3) will increase coverage by 0.03%.
The diff coverage is 85.71%.

@@            Coverage Diff             @@
##           master    #3419      +/-   ##
==========================================
+ Coverage   84.25%   84.28%   +0.03%     
==========================================
  Files         214      214              
  Lines        8392     8402      +10     
  Branches       33       33              
==========================================
+ Hits         7071     7082      +11     
+ Misses       1321     1320       -1     

Impacted Files	Coverage Δ
packages/dd-trace/src/service-naming/index.js	69.23% <50.00%> (ø)
packages/dd-trace/src/config.js	99.11% <100.00%> (+<0.01%)	⬆️

... and 4 files with indirect coverage changes

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[tlhunter]

This is missing the typescript definition for the additional config property