fix(perf): increase root volume size (#249)

Multiple perf runs have failed due to "no space left on device". See e.g. https://github.com/libp2p/test-plans/actions/runs/5727165977/job/15527780097.

The perf terraform launch template previously did not specify a root volume
size. Thus terraform used the default:

```
df -h

Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        4.0M     0  4.0M   0% /dev
tmpfs            63G     0   63G   0% /dev/shm
tmpfs            25G  540K   25G   1% /run
/dev/nvme0n1p1  8.0G  1.9G  6.1G  24% /
tmpfs            63G     0   63G   0% /tmp
tmpfs            13G     0   13G   0% /run/user/1000
```

With this commit the root volume is increased to 100GB:

```
df -h

Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        4.0M     0  4.0M   0% /dev
tmpfs            63G     0   63G   0% /dev/shm
tmpfs            25G  564K   25G   1% /run
/dev/nvme0n1p1  100G  2.6G   98G   3% /
tmpfs            63G  8.0K   63G   1% /tmp
tmpfs            13G     0   13G   0% /run/user/0
tmpfs            13G     0   13G   0% /run/user/1000
```

perf/terraform/modules/long_lived/main.tf

@@ -108,4 +108,13 @@ resource "aws_launch_template" "perf" {
     security_groups = [aws_security_group.restricted_inbound.id]
     delete_on_termination = true
   }
+
+  block_device_mappings {
+    device_name = "/dev/xvda"
+    ebs {
+      volume_size           = 100 # New root volume size in GiB
+      volume_type           = "gp2"
+      delete_on_termination = true
+    }
+  }
 }

perf/terraform/modules/short_lived/main.tf

@@ -19,7 +19,7 @@ resource "aws_instance" "perf" {
 
   launch_template {
     name = "perf-node"
-    version = "2"
+    version = "3"
   }
 
   key_name = aws_key_pair.perf.key_name