Replace tri-state types with a single type, deprecating their uses in public APIs

[kstenerud]

This simplifies the interface and avoids needing yet another tri-state type when CPU metrics are added in the next PR.

This also introduces metrics config and option objects, which will hold all of the different metric types.

Note: There is some CPU configuration stuff in here (but no implementations). It makes it easier to just split by file in this case, even though it doesn't make semantic sense between PRs.

Deprecations:

• BugsnagPerformanceConfiguration .autoInstrumentRendering has been deprecated. Please use BugsnagPerformanceConfiguration. enabledMetrics. rendering instead.
• BugsnagPerformanceSpanOptions.instrumentRendering has been deprecated. Please use BugsnagPerformanceSpanOptions.metricsOptions.rendering instead.
• The BSGFirstClass type has been deprecated. Please use BSGTriState instead.
• The BSGInstrumentRendering type has been deprecated. Please use BSGTriState instead.

Design

Added new BugsnagPerformanceSpanMetricsOptions object to BugsnagPerformanceSpanOptions which will hold current and future metrics configuration options when creating spans.

Added new BugsnagPerformanceEnabledMetrics object to BugsnagPerformanceConfiguration, which controls overall whether certain metrics are collected or not.

BSGTriState replaces BSGFirstClass and BSGInstrumentRendering types.

[github-actions]

BugsnagPerformance.framework binary size increased by 5,480 bytes from 528,368 to 533,848

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  -2.9%     -64  -2.9%     -64    [__DATA_CONST]
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  [ = ]       0 -44.5% -5.35Ki    [__LINKEDIT]
  +1.0% +5.35Ki  [ = ]       0    TOTAL

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