Introduce forward references in pretty printer

[mjesun]

Importing an internal patch from @camspiers to make pretty-format aware of forwarded references inside React.

[camspiers]

Thanks for the quick response @mjesun

For additional context, without this diff snapshot tests for components that use React.forwardRef would end up having a component name of "UNDEFINED", much like the following issues and PR:

#5816
#5786

[codecov-io]

Codecov Report

Merging #6069 into master will decrease coverage by <.01%.
The diff coverage is 50%.

@@            Coverage Diff             @@
##           master    #6069      +/-   ##
==========================================
- Coverage   64.13%   64.12%   -0.01%     
==========================================
  Files         217      217              
  Lines        8328     8332       +4     
  Branches        4        3       -1     
==========================================
+ Hits         5341     5343       +2     
- Misses       2986     2988       +2     
  Partials        1        1

Impacted Files	Coverage Δ
...ackages/pretty-format/src/plugins/react_element.js	92% <50%> (-8%)	⬇️

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[camspiers]

@mjesun Looks like this didn't fix the issue. It needs to be:

  if (typeof element.type === 'object' && element.type !== null
    && element.type.$$typeof === forwardRefSymbol) {
    const functionName =
      element.type.render.displayName || element.type.render.name || '';

    return functionName !== ''
      ? 'ForwardRef(' + functionName + ')'
      : 'ForwardRef';
  }

[github-actions]

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