Add Apprise notification integration (#26868)

* Added apprise notification component

* flake-8 fixes; black formatting + import merged to 1 line

* pylint issues resolved

* added github name to manifest.json

* import moved to top as per code review request

* manifest formatting to avoid failing ci

* .coveragerc updated to include apprise

* removed block for written tests

* more test coverage

* formatting as per code review

* tests converted to async style as per code review

* increased coverage

* bumped version of apprise to 0.8.1

* test that mocked entries are called

* added tests for hass.service loading

* support tags for those who identify the TARGET option

* renamed variable as per code review

* 'assert not' used instead of 'is False'

* added period (in case linter isn't happy)