expect: Improve report when mock-spy matcher fails, part 4 (#8710)

* expect: Improve report when mock-spy matcher fails, part 4

* Update CHANGELOG.md

* Update code and snapshots after review by Michał

* Replace label with Number of returns/calls

* Add function call as explicit subject

* Delete value from Expected and Received labels

* Update snapshots

Author: pedrottimark

CHANGELOG.md

@@ -7,6 +7,7 @@
 - `[expect]` Improve report when mock-spy matcher fails, part 1 ([#8640](https://github.com/facebook/jest/pull/8640))
 - `[expect]` Improve report when mock-spy matcher fails, part 2 ([#8649](https://github.com/facebook/jest/pull/8649))
 - `[expect]` Improve report when mock-spy matcher fails, part 3 ([#8697](https://github.com/facebook/jest/pull/8697))
+- `[expect]` Improve report when mock-spy matcher fails, part 4 ([#8710](https://github.com/facebook/jest/pull/8710))
 - `[jest-snapshot]` Highlight substring differences when matcher fails, part 3 ([#8569](https://github.com/facebook/jest/pull/8569))
 - `[jest-cli]` Improve chai support (with detailed output, to match jest exceptions) ([#8454](https://github.com/facebook/jest/pull/8454))
 - `[*]` Manage the global timeout with `--testTimeout` command line argument. ([#8456](https://github.com/facebook/jest/pull/8456))