[PLAT-8639] Add usage telemetry

[nickdowell]

Goal

Allow Bugsnag to determine usage of configuration options, to aid product development.

Changeset

Adds a "usage" telemetry configuration option.

Adds a function to create a usage dictionary based on current configuration - BSGTelemetryCreateUsage().

Includes "usage" in handled and crashing errors. OOMs and other kills intentionally out of scope.

Testing

BSGTelemetryCreateUsage() is covered by new unit tests.

E2E tests verify the presence of "usage" and that it is omitted when the telemetry option is disabled.

[github-actions]

Bugsnag.framework binary size increased by 488 bytes from 815,472 to 815,960

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  +1.3% +3.29Ki  +1.3% +3.29Ki    __TEXT,__text
  +3.7%    +736  +3.7%    +736    __DATA,__cfstring
  +0.3%    +384  +0.3%    +384    Symbol Table
  +1.6%    +299  +1.6%    +299    __TEXT,__cstring
  +0.2%     +96  +0.2%     +96    __DATA,__objc_const
  +0.0%     +72  +0.0%     +72    String Table
  +0.1%     +38  +0.1%     +38    __TEXT,__objc_methname
  +0.3%     +24  +0.3%     +24    Export Info
  +0.4%     +24  +0.4%     +24    __DATA,__objc_selrefs
  +0.4%      +8  +0.4%      +8    Function Start Addresses
  [ = ]       0  +0.1%      +8    __DATA,__bss
  +0.4%      +4  +0.4%      +4    __DATA,__objc_ivar
  -0.9%     -32  -0.9%     -32    __DATA,__const
  [ = ]       0 -13.1%    -488    [__LINKEDIT]
  -9.3%    -828  -5.4%    -836    [__DATA]
 -15.4% -3.61Ki -15.4% -3.61Ki    [__TEXT]
  +0.1%    +488  [ = ]       0    TOTAL

Generated by 🚫 Danger