Add a configuration option to the speedscope converter for the handling of utf8 errors

[sj-i]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 6990981554

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• 0 of 20 (0.0%) changed or added relevant lines in 4 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.3%) to 83.043%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/Converter/Speedscope/Settings/SpeedscopeConverterSettings.php	0	1	0.0%
src/Converter/Speedscope/SpeedscopeConverter.php	0	1	0.0%
src/Converter/Speedscope/Settings/Utf8ErrorHandlingType.php	0	5	0.0%
src/Converter/Speedscope/Settings/SpeedscopeConverterSettingsFromConsoleInput.php	0	13	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/Lib/PhpProcessReader/PhpZendMemoryManagerChunkFinder.php	1	83.33%

Totals
Change from base Build 6990528163:	-0.3%
Covered Lines:	4868
Relevant Lines:	5862

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💛 - Coveralls