@azure/notification-hubs_1.2.2

[notification-hubs] Fix FCMV1 bugs (#29507)

### Packages impacted by this PR

- @azure/notification-hubs

### Issues associated with this PR

- #29465

### Describe the problem that is addressed by this PR

Fixes the right signatures for the FCM versus FCM Legacy.

### What are the possible designs available to address the problem? If
there are more than one possible design, why was the one in this PR
chosen?


### Are there test cases added in this PR? _(If not, why?)_


### Provide a list of related PRs _(if any)_


### Command used to generate this PR:**_(Applicable only to SDK release
request PRs)_

### Checklists
- [ ] Added impacted package name to the issue description
- [ ] Does this PR needs any fixes in the SDK Generator?** _(If so,
create an Issue in the
[Autorest/typescript](https://github.com/Azure/autorest.typescript)
repository and link it here)_
- [ ] Added a changelog (if necessary)