Rewrite the tests to be able to run between multiple computers over network, using ssh

Description

Until now the tests have been run locally on the same computer, by putting each node on a different port on localhost. This MR rewrites the tests to be able to run them over multiple computers.

List of changes

• Rewrite build network to send the binary and powers over ssh using rsync to other computers of the network that need it
• Rewrite all the tests to be able to check results over ssh (since sometimes checking a test requires comparing the original and reconstructed file, and they are not always on the same computer)

cli/app.nu

@@ -139,6 +139,14 @@ export def start-provide [
     $"start-provide/($key)" | run-command $node
 }
 
+export def stop-provide [
+    key: string,
+    --node: string = $DEFAULT_IP
+]: nothing -> any {
+    log debug $"($node) stops providing ($key)"
+    $"stop-provide/($key)" | run-command $node
+}
+
 export def get-providers [
     key: string,
     --node: string = $DEFAULT_IP
@@ -176,7 +184,6 @@ export def decode-blocks [
 
 export def encode-file [
     file_path: string,
-    --powers_path: string = $POWERS_PATH,
     --replace-blocks = true,
     --k: int = 3,
     --n: int = 5,
@@ -185,8 +192,7 @@ export def encode-file [
 ] nothing -> any {
     log debug $"encoding the file ($file_path)"
     let file_path_enc = $file_path | slash replace
-    let powers_path_enc = ($powers_path | slash replace)
-    let list_args = [$file_path_enc, $replace_blocks, $encoding_method, $k, $n, $powers_path_enc]
+    let list_args = [$file_path_enc, $replace_blocks, $encoding_method, $k, $n]
     $"encode-file/($list_args | str join '/')" | run-command $node
 }
 
@@ -194,10 +200,14 @@ export def get-block-from [
     peer_id_base_58: string,
     file_hash: string,
     block_hash: string,
+    --no_save
     --node: string = $DEFAULT_IP
 ] nothing -> any {
     log debug $"get block ($block_hash) part of file ($file_hash) from peer ($peer_id_base_58)"
-    $"get-block-from/($peer_id_base_58)/($file_hash)/($block_hash)" | run-command $node | get block_data | bytes from_int
+    let res = $"get-block-from/($peer_id_base_58)/($file_hash)/($block_hash)/(not $no_save)" | run-command $node
+    if $no_save {
+        $res | get block_data | bytes from_int
+    }
 }
 
 def "slash replace" [] string -> string {
@@ -265,3 +275,11 @@ export def get-available-storage [
     log debug $"Getting the size left available for sending blocks from ($node)"
     $"get-available-storage" | run-command $node
 }
+
+export def change-available-send-storage [
+    --node: string = $DEFAULT_IP,
+    new_storage_space: int,
+] nothing -> any {
+    log debug $"Changing the total available storage space to be ($new_storage_space)"
+    $"change-available-send-storage/($new_storage_space)" | run-command $node
+}