feat: allow configuration of postfix for received screenshots filename

[eins78]

Description

Currently received screenshots are stored with the filename snapshotID + -received + .png.
This PR makes the -received part of this configurable.

Motivation and Context

I want to set it to "" (no prefix) to more easily update the baseline images in CI:
by outputting the received images to another directory using the options
storeReceivedOnFailure: true, updatePassedSnapshot: true, customReceivedDir: …,
it is possible to later update the baseline images without running jest again with the -u flag (which takes a very long time and just repeats work already done).

How Has This Been Tested?

In my project and a unit test

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation (adding or updating documentation)
• Dependency update

Checklist:

• My change requires a change to the documentation and I have updated the documentation accordingly.
• My changes are in sync with the code style of this project.
• There aren't any other open Pull Requests for the same issue/update.
• These changes should be applied to a maintenance branch.
• I have added the Apache 2.0 license header to any new files created.

What is the Impact to Developers Using Jest-Image-Snapshot?

[oneamexbot]

🎉 This PR is included in version 6.2.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀