nodepool: make ARM64 config names consistent

Our convention with the names is "<provider>-<region>" which hasn't
been followed for these two cases.

This mostly only affects the key for the stats reported to graphite.
I never noticed with linaro because our stats generally match
"<provider>-*" and "linaro-us" just so happened to match that :/

Change-Id: Icbbcebd48abc56d0458cb6f9fb1c0b63249f6da4

nodepool/nb03.opendev.org.yaml

@@ -12,7 +12,7 @@ zookeeper-servers:
     port: 2281
 
 providers:
-  - name: linaro-us
+  - name: linaro-us-regionone
     region-name: 'RegionOne'
     cloud: linaro-us
     rate: 0.25
@@ -74,7 +74,7 @@ providers:
           hw_disk_bus: scsi
           hw_scsi_model: virtio-scsi
 
-  - name: osuosl
+  - name: osuosl-regionone
     region-name: 'RegionOne'
     cloud: osuosl
     rate: 0.25

nodepool/nl03.opendev.org.yaml

@@ -415,7 +415,7 @@ providers:
             diskimage: centos-8-stream
             key-name: infra-root-keys-2020-05-13
 
-  - name: linaro-us
+  - name: linaro-us-regionone
     region-name: 'RegionOne'
     cloud: linaro-us
     boot-timeout: 600
@@ -496,7 +496,7 @@ providers:
             diskimage: ubuntu-focal-arm64
             key-name: infra-root-keys-2020-05-13
 
-  - name: osuosl
+  - name: osuosl-regionone
     region-name: 'RegionOne'
     cloud: osuosl
     boot-timeout: 600