Port otel enhanced file input benchmarking

[jsirianni]

Description of Changes

See open-telemetry/opentelemetry-log-collection#166

This pr builds on

• Cleanup test cases for file input #343

Please check that the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• Add a changelog entry (for non-trivial bug fixes / features)
• CI passes

[djaglowski]

Log Files	Logs / Second	CPU Avg (%)	CPU Avg Δ (%)	Memory Avg (MB)	Memory Avg Δ (MB)
1	1000	1.51735	+0.0173316	129.29121	+2.598999
1	5000	5.1208787	+0.39660645	139.43602	-0.8009186
1	10000	9.948323	-1.1039886	142.7597	-0.8887329
1	50000	50.64128	+5.367012	176.24272	+4.3729706
1	100000	91.70903	-0.41596222	238.54216	+0.7741089
10	100	1.8103399	+0.017153502	136.12958	+2.630661
10	500	5.9828787	+0.6207857	140.17363	-0.171875
10	1000	11.758782	-0.2244091	149.38496	+0.84010315
10	5000	55.034863	-0.7258339	177.38187	-0.6641998
10	10000	105.143845	+5.9057083	229.44545	-5.280716

[codecov]

Codecov Report

Merging #344 (e51a2ae) into master (f9245d9) will decrease coverage by 0.23%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #344      +/-   ##
==========================================
- Coverage   69.64%   69.41%   -0.23%     
==========================================
  Files         123      123              
  Lines        6495     6496       +1     
==========================================
- Hits         4523     4509      -14     
- Misses       1498     1512      +14     
- Partials      474      475       +1     

Impacted Files	Coverage Δ
operator/builtin/input/file/config.go	75.38% <100.00%> (-2.74%)	⬇️
logger/parser.go	56.52% <0.00%> (-17.39%)	⬇️
operator/builtin/input/tcp/tcp.go	69.30% <0.00%> (-4.39%)	⬇️
operator/builtin/input/file/file.go	73.79% <0.00%> (-2.07%)	⬇️
operator/builtin/output/newrelic/newrelic.go	71.03% <0.00%> (-0.93%)	⬇️

---

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[djaglowski]

Log Files	Logs / Second	CPU Avg (%)	CPU Avg Δ (%)	Memory Avg (MB)	Memory Avg Δ (MB)
1	1000	1.46551	-0.06899297	130.25714	+2.6558456
1	5000	5.224235	-0.3620758	135.8851	+0.474411
1	10000	9.999927	+0.58596706	144.55455	+0.5897064
1	50000	46.328697	-2.2407722	175.41716	+2.9863892
1	100000	90.68924	-6.3656464	231.65652	-5.4074554
10	100	1.8103532	-0.017219901	132.49043	-0.41392517
10	500	6.0000544	+0.017110825	141.3129	+1.062088
10	1000	10.741545	-1.2238941	146.33836	-1.9544678
10	5000	50.36356	+0	180.27519	+0
10	10000	99.72423	-7.9164124	226.80212	-1.9042358