[Plat-12269] Prevent inlining of stack trace entries that are going to be pruned

[kstenerud]

Goal

We prune the top of the stack trace so that our stack trace gathering code doesn't show in customer traces. However, if the optimizer inlines any of the functions/methods along the path, it breaks the pruning.

Design

Force everything along the trace gathering path to NOT be optimized, so that they are never folded or inlined.

[github-actions]

Bugsnag.framework binary size increased by 136 bytes from 718,176 to 718,312

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  +0.1%    +136  +0.1%    +136    __TEXT,__text
  +0.1%     +80  +0.1%     +80    Symbol Table
  +0.0%     +56  +0.0%     +56    String Table
  -0.1%      -4  -0.1%      -4    __TEXT,__unwind_info
  -0.8%    -132  -0.8%    -132    [__TEXT]
  [ = ]       0  -5.0%    -136    [__LINKEDIT]
  +0.0%    +136  [ = ]       0    TOTAL

Generated by 🚫 Danger

[lemnik]

LGTM