fix(expect): fix error messages for toMatchObject

[IgorM867]

Matcher toMatchObject throws the same error message when it called with .not and without .not.

Without .not:

it("toMatchObject without not", () => {
  expect({ foo: 0 }).toMatchObject({ foo: 1 });
});

Error:

error: AssertionError: Expected {
  foo: 0,
} to NOT match {
  foo: 1,
}

With .not:

it("toMatchObject with not", () => {
  expect({ foo: 0 }).not.toMatchObject({ foo: 0 });
});

Error:

error: AssertionError: Expected {
  foo: 0,
} to NOT match {
  foo: 0,
}

Fixes #6224

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.51%. Comparing base (2c7d7d6) to head (d745bb2).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6228   +/-   ##
=======================================
  Coverage   96.51%   96.51%           
=======================================
  Files         534      534           
  Lines       40971    40976    +5     
  Branches     6133     6134    +1     
=======================================
+ Hits        39542    39549    +7     
+ Misses       1386     1385    -1     
+ Partials       43       42    -1     

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[kt3k]

LGTM. Thanks!