minor symfony#21068 [Mailer] Add new assertEmailAddressNotContains method (santysisi)

This PR was merged into the 7.4 branch.

Discussion
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[Mailer] Add new `assertEmailAddressNotContains` method

Add new `MailerAssertionsTrait` method called `assertEmailAddressNotContains`

Commits
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6e4ba05 [Mailer] Add new assertEmailAddressNotContains method

Author: javiereguiluz

testing.rst

@@ -1082,8 +1082,8 @@ Mailer Assertions
 ``assertEmailHeaderSame(RawMessage $email, string $headerName, string $expectedValue, string $message = '')``/``assertEmailHeaderNotSame(RawMessage $email, string $headerName, string $expectedValue, string $message = '')``
     Asserts that the given email does (not) have the expected header set to
     the expected value.
-``assertEmailAddressContains(RawMessage $email, string $headerName, string $expectedValue, string $message = '')``
-    Asserts that the given address header equals the expected e-mail
+``assertEmailAddressContains(RawMessage $email, string $headerName, string $expectedValue, string $message = '')``/``assertEmailAddressNotContains(RawMessage $email, string $headerName, string $expectedValue, string $message = '')``
+    Asserts that the given address header does (not) equal the expected e-mail
     address. This assertion normalizes addresses like ``Jane Smith
     <jane@example.com>`` into ``jane@example.com``.
 ``assertEmailSubjectContains(RawMessage $email, string $expectedValue, string $message = '')``/``assertEmailSubjectNotContains(RawMessage $email, string $expectedValue, string $message = '')``