ci(ssh): connect using ssh-compute action by Google (#5330)

* refactor(ssh): connect using `ssh-compute` action by Google

Previous behavior:
From time to time SSH connections to deployed VMs fails with the following
error: `kex_exchange_identification: Connection closed by remote host`

This was still happening after implementing #5292

Excpected behavior:
Ensure we're not creating SSH key pairs on the fly to improve our connections
guarantees

Solution:
- Enable the Cloud Identity-Aware Proxy API in GCP
- Create a firewall rule to enable connections from IAP
- Grant the required IAM permissions to enable IAP TCP forwarding
- Generate an SSH keys pair and set a private key as an input param
- Set the GitHub Action SA to have authorized ssh connection to the VMs
- Implement the `google-github-actions/ssh-compute` action to connect

* fix(ssh): id `compute-ssh` cannot be used more than once within the same scope

* fix(ci): try to enclose commands to override parsing issues

* tmp: remove ssh_args

* fix(action): secrets must be inherited to be used

* tmp: validate command enclosing fixes executin

* fix(ssh): ssh_args are not implemented correctly

* fix(ssh): login with the root user

* fix(privelege): uso sudo with docker commands

* tmp: add sudo

* fix(ssh): use sudo for all docker commands

* fix(ssh): add missing `sudo` commands

* fix(ssh): get sync height from ssh stdout

* fix(height): get the height correctly

.github/workflows/continous-integration-docker.yml

@@ -281,6 +281,7 @@ jobs:
       saves_to_disk: true
       disk_suffix: checkpoint
       height_grep_text: 'flushing database to disk .*height.*=.*Height.*\('
+    secrets: inherit
 
   # Test that Zebra syncs and fully validates a few thousand blocks from a cached mandatory checkpoint disk
   #
@@ -299,6 +300,7 @@ jobs:
       needs_zebra_state: true
       saves_to_disk: false
       disk_suffix: checkpoint
+    secrets: inherit
 
   # zebrad cached tip state tests
 
@@ -328,6 +330,7 @@ jobs:
       saves_to_disk: true
       disk_suffix: tip
       height_grep_text: 'current_height.*=.*Height.*\('
+    secrets: inherit
     # We don't want to cancel running full syncs on `main` if a new PR gets merged,
     # because we might never finish a full sync during busy weeks. Instead, we let the
     # first sync complete, then queue the latest pending sync, cancelling any syncs in between.
@@ -367,6 +370,7 @@ jobs:
       root_state_path: '/var/cache'
       zebra_state_dir: 'zebrad-cache'
       height_grep_text: 'current_height.*=.*Height.*\('
+    secrets: inherit
 
   # lightwalletd cached tip state tests
 
@@ -400,6 +404,7 @@ jobs:
       zebra_state_dir: 'zebrad-cache'
       lwd_state_dir: 'lwd-cache'
       height_grep_text: '(current_height.*=.*Height.*\()|(Adding block to cache )'
+    secrets: inherit
 
   # Test update sync of lightwalletd with a lightwalletd and Zebra tip state
   # Runs:
@@ -428,6 +433,7 @@ jobs:
       zebra_state_dir: 'zebrad-cache'
       lwd_state_dir: 'lwd-cache'
       height_grep_text: '(current_height.*=.*Height.*\()|(Adding block to cache )'
+    secrets: inherit
 
   # Test that Zebra can answer a synthetic RPC call, using a cached Zebra tip state
   #
@@ -452,6 +458,7 @@ jobs:
       disk_suffix: tip
       root_state_path: '/var/cache'
       zebra_state_dir: 'zebrad-cache'
+    secrets: inherit
 
   # Test that Zebra can handle a lightwalletd send transaction RPC call, using a cached Zebra tip state
   #
@@ -479,6 +486,7 @@ jobs:
       root_state_path: '/var/cache'
       zebra_state_dir: 'zebrad-cache'
       lwd_state_dir: 'lwd-cache'
+    secrets: inherit
 
   # Test that Zebra can handle gRPC wallet calls, using a cached Zebra tip state
   #
@@ -505,3 +513,4 @@ jobs:
       root_state_path: '/var/cache'
       zebra_state_dir: 'zebrad-cache'
       lwd_state_dir: 'lwd-cache'
+    secrets: inherit