[HOLD for payment 2023-01-26] Make `getMergeLogsAsJSON` more robust

[roryabraham]

Problem

We've got some code here that logs commit message using git log and then sanitizes the output and turns it to JSON.

This code is fickle, because any symbols included in commit messages that break JSON.parse will cause an error. We've seen a number of instances of this happening over the last year, and it seems likely to continue happening until we nail this code down a bit more robustly.

Solution

1. Extract a small module to src/libs/sanitizeStringForJSON, that escapes special characters from a string to prepare it to be used in JSON.parse
2. Use this library in GitUtils.getMergeLogsAsJSON
3. Add a new set of Jest unit tests to cover sanitizeStringForJSON.

Here are some suggestions to get you started.

[mallenexpensify]

Any idea why the Awaiting Payment label got added, don't seen a linked PR anywhere, asking cuz wondering if anyone is due compensation

[roryabraham]

Idk, @yuwenmemon implemented this so the awaiting payment stuff was not correct in this case