File input: Quiet close error

[jsirianni]

Description of Changes

Skip closing files already closed, same as open-telemetry/opentelemetry-log-collection#174

This pr builds on

• Cleanup test cases for file input #343
• Port otel enhanced file input benchmarking #344

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	1.3793627	-0.120655656	128.35736	+1.6651459
1	5000	5.4656396	+0.74136734	137.70273	-2.5342102
1	10000	9.344765	-1.7075472	140.69788	-2.9505615
1	50000	49.65387	+4.3796005	170.93561	-0.93414307
1	100000	97.00854	+4.883545	221.13362	-16.63443
10	100	1.8793787	+0.08619225	132.62271	-0.87620544
10	500	5.931199	+0.5691061	139.71538	-0.63012695
10	1000	11.448379	-0.5348129	147.10655	-1.4383087
10	5000	49.12108	-6.639618	174.5687	-3.4773712
10	10000	105.87744	+6.639305	225.67148	-9.0546875

[codecov]

Codecov Report

Merging #345 (2780d31) into master (baa994e) will decrease coverage by 0.12%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #345      +/-   ##
==========================================
- Coverage   69.68%   69.56%   -0.12%     
==========================================
  Files         123      123              
  Lines        6491     6491              
==========================================
- Hits         4523     4515       -8     
- Misses       1492     1501       +9     
+ Partials      476      475       -1     

Impacted Files	Coverage Δ
operator/builtin/input/file/file.go	73.61% <ø> (-0.18%)	⬇️
operator/builtin/input/file/config.go	75.38% <100.00%> (-2.74%)	⬇️
logger/parser.go	56.52% <0.00%> (-17.39%)	⬇️
operator/builtin/input/file/reader.go	66.67% <0.00%> (-1.19%)	⬇️
operator/builtin/output/newrelic/newrelic.go	71.03% <0.00%> (-0.93%)	⬇️

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