feat: convert entire CLI to clibase (#6491)

I'm sorry.

cli/testdata/coder_speedtest_--help.golden

@@ -1,28 +1,18 @@
+Usage: coder speedtest [flags] <workspace>
+
 Run upload and download tests from your machine to a workspace
 
-Usage:
-  coder speedtest <workspace> [flags]
+Options
+  -d, --direct bool
+          Specifies whether to wait for a direct connection before testing
+          speed.
 
-Flags:
-  -d, --direct             Specifies whether to wait for a direct connection before testing speed.
-      --direction string   Specifies whether to run in reverse mode where the client receives
-                           and the server sends. (up|down) (default "down")
-  -h, --help               help for speedtest
-  -t, --time duration      Specifies the duration to monitor traffic. (default 5s)
+      --direction up|down (default: down)
+          Specifies whether to run in reverse mode where the client receives and
+          the server sends.
 
-Global Flags:
-      --global-config coder   Path to the global coder config directory.
-                              Consumes $CODER_CONFIG_DIR (default "~/.config/coderv2")
-      --header stringArray    HTTP headers added to all requests. Provide as "Key=Value".
-                              Consumes $CODER_HEADER
-      --no-feature-warning    Suppress warnings about unlicensed features.
-                              Consumes $CODER_NO_FEATURE_WARNING
-      --no-version-warning    Suppress warning when client and server versions do not match.
-                              Consumes $CODER_NO_VERSION_WARNING
-      --token string          Specify an authentication token. For security reasons setting
-                              CODER_SESSION_TOKEN is preferred.
-                              Consumes $CODER_SESSION_TOKEN
-      --url string            URL to a deployment.
-                              Consumes $CODER_URL
-  -v, --verbose               Enable verbose output.
-                              Consumes $CODER_VERBOSE
+  -t, --time duration (default: 5s)
+          Specifies the duration to monitor traffic.
+
+---
+Run `coder --help` for a list of global options.