Bug 1453189 - Stop using deprecated django-filters 'Filter.name'

Fixes dozens of deprecation warnings of form:
```
treeherder/webapp/api/jobs.py:41: DeprecationWarning: `Filter.name`
has been renamed to `Filter.field_name`. See:
https://django-filter.readthedocs.io/en/develop/migration.html
  id = django_filters.NumberFilter(name='id')
```

treeherder/webapp/api/jobs.py

@@ -39,42 +39,42 @@ class JobFilter(django_filters.FilterSet):
     We use this gigantic class to provide the same filtering interface
     as the previous jobs API
     """
-    id = django_filters.NumberFilter(name='id')
-    id__in = NumberInFilter(name='id', lookup_expr='in')
-    tier__in = NumberInFilter(name='tier', lookup_expr='in')
-    push_id__in = NumberInFilter(name='push_id', lookup_expr='in')
-    job_guid = django_filters.CharFilter(name='guid')
-    job_guid__in = CharInFilter(name='guid', lookup_expr='in')
+    id = django_filters.NumberFilter(field_name='id')
+    id__in = NumberInFilter(field_name='id', lookup_expr='in')
+    tier__in = NumberInFilter(field_name='tier', lookup_expr='in')
+    push_id__in = NumberInFilter(field_name='push_id', lookup_expr='in')
+    job_guid = django_filters.CharFilter(field_name='guid')
+    job_guid__in = CharInFilter(field_name='guid', lookup_expr='in')
     build_architecture = django_filters.CharFilter(
-        name='build_platform__architecture')
+        field_name='build_platform__architecture')
     build_os = django_filters.CharFilter(
-        name='build_platform__os_name')
+        field_name='build_platform__os_name')
     build_platform = django_filters.CharFilter(
-        name='build_platform__platform')
+        field_name='build_platform__platform')
     build_system_type = django_filters.CharFilter(
-        name='signature__build_system_type')
+        field_name='signature__build_system_type')
     job_group_id = django_filters.NumberFilter(
-        name='job_group_id')
+        field_name='job_group_id')
     job_group_name = django_filters.CharFilter(
-        name='job_group__name')
+        field_name='job_group__name')
     job_group_symbol = django_filters.CharFilter(
-        name='job_group__symbol')
+        field_name='job_group__symbol')
     job_type_name = django_filters.CharFilter(
-        name='job_type__name')
+        field_name='job_type__name')
     job_type_symbol = django_filters.CharFilter(
-        name='job_type__symbol')
+        field_name='job_type__symbol')
     machine_name = django_filters.CharFilter(
-        name='machine__name')
+        field_name='machine__name')
     machine_platform_architecture = django_filters.CharFilter(
-        name='machine_platform__architecture')
+        field_name='machine_platform__architecture')
     machine_platform_os = django_filters.CharFilter(
-        name='machine_platform__os_name')
+        field_name='machine_platform__os_name')
     platform = django_filters.CharFilter(
-        name='machine_platform__platform')
+        field_name='machine_platform__platform')
     ref_data_name = django_filters.CharFilter(
-        name='signature__name')
+        field_name='signature__name')
     signature = django_filters.CharFilter(
-        name='signature__signature')
+        field_name='signature__signature')
 
     class Meta:
         model = Job
@@ -531,14 +531,14 @@ def filter(self, qs, value):
 
                 return django_filters.Filter.filter(self, qs, value)
 
-        job_id = django_filters.NumberFilter(name='job')
-        job_id__in = NumberInFilter(name='job', lookup_expr='in')
-        job_guid = django_filters.CharFilter(name='job__guid')
-        job__guid = django_filters.CharFilter(name='job__guid')  # for backwards compat
-        title = django_filters.CharFilter(name='title')
-        value = django_filters.CharFilter(name='value')
-        push_id = django_filters.NumberFilter(name='job__push')
-        repository = django_filters.CharFilter(name='job__repository__name')
+        job_id = django_filters.NumberFilter(field_name='job')
+        job_id__in = NumberInFilter(field_name='job', lookup_expr='in')
+        job_guid = django_filters.CharFilter(field_name='job__guid')
+        job__guid = django_filters.CharFilter(field_name='job__guid')  # for backwards compat
+        title = django_filters.CharFilter(field_name='title')
+        value = django_filters.CharFilter(field_name='value')
+        push_id = django_filters.NumberFilter(field_name='job__push')
+        repository = django_filters.CharFilter(field_name='job__repository__name')
 
         class Meta:
             model = JobDetail