tests: Fix minor issue in the config yaml file testing (#20005)

Convert x86_64 to amd64 in the test script to correctly download mc binary.

docs/tuning/README.md

@@ -0,0 +1,26 @@
+# How to enable 'minio' performance profile with tuned?
+
+## Prerequisites
+
+Please make sure the following packages are already installed via `dnf` or `apt`: 
+
+- `tuned`
+- `curl`
+
+### Install `tuned.conf` performance profile
+
+#### Step 1 - download `tuned.conf` from the referenced link
+```
+wget https://raw.githubusercontent.com/minio/minio/master/docs/tuning/tuned.conf
+```
+
+#### Step 2 - install tuned.conf as supported performance profile on all nodes
+```
+sudo mkdir -p /usr/lib/tuned/minio/
+sudo mv tuned.conf /usr/lib/tuned/minio
+```
+
+#### Step 3 - to enable minio performance profile on all the nodes
+```
+sudo tuned-admin profile minio
+```