chore(deps): update dependency google-cloud-monitoring to v1 (#3950)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [google-cloud-monitoring](https://togithub.com/googleapis/python-monitoring) | major | `==0.36.0` -> `==1.0.0` |

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### Release Notes

<details>
<summary>googleapis/python-monitoring</summary>

### [`v1.0.0`](https://togithub.com/googleapis/python-monitoring/blob/master/CHANGELOG.md#&#8203;100-httpswwwgithubcomgoogleapispython-monitoringcomparev0360v100-2020-06-03)

[Compare Source](https://togithub.com/googleapis/python-monitoring/compare/v0.36.0...v1.0.0)

##### Features

-   set release_status to Production/Stable ([#&#8203;8](https://www.github.com/googleapis/python-monitoring/issues/8)) ([a99d67a](https://www.github.com/googleapis/python-monitoring/commit/a99d67a4f1399b9a74f189c6332cd85e56149fac))

</details>

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bigquery/datalab-migration/requirements.txt

@@ -3,4 +3,4 @@ google-cloud-bigquery[pandas,pyarrow]==1.24.0
 datalab==1.2.0
 ipython==7.13.0; python_version > "2.7"
 ipython<=5.5; python_version == "2.7"
-google-cloud-monitoring==0.36.0
+google-cloud-monitoring==1.0.0

bigtable/metricscaler/requirements.txt

@@ -1,2 +1,2 @@
 google-cloud-bigtable==1.2.1
-google-cloud-monitoring==0.36.0
+google-cloud-monitoring==1.0.0

monitoring/api/v3/alerts-client/requirements.txt

@@ -1,2 +1,2 @@
-google-cloud-monitoring==0.36.0
+google-cloud-monitoring==1.0.0
 tabulate==0.8.7

monitoring/api/v3/cloud-client/requirements.txt

@@ -1 +1 @@
-google-cloud-monitoring==0.36.0
+google-cloud-monitoring==1.0.0

monitoring/api/v3/uptime-check-client/requirements.txt

@@ -1,2 +1,2 @@
-google-cloud-monitoring==0.36.0
+google-cloud-monitoring==1.0.0
 tabulate==0.8.7

trace/cloud-trace-demo-app/app/requirements.txt

@@ -1,4 +1,4 @@
-google-cloud-monitoring==0.36.0
+google-cloud-monitoring==1.0.0
 google-cloud-trace==0.23.0
 opencensus==0.7.7
 Flask==1.1.2