Move yb-ctl to yugabyte repo

Summary:
Making modifications in a secondary repo and pulling them in is tiring. It is not clear the
separate repo benefits are worth this process.

Test Plan:
Run yb-ctl in dev repo. TODO: Build a package and verify yb-ctl works properly from
within the package

Reviewers: bogdan, mikhail, jason

Subscribers: ybase

Differential Revision: https://phabricator.dev.yugabyte.com/D8674

Author: iSignal

.github/workflows/yb-ctl-test.yml

@@ -0,0 +1,42 @@
+name: yb-ctl-test
+
+# Controls when the action will run. Triggers the workflow on push or pull request
+# events but only for the master branch
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - '**/yb-ctl*'
+
+  pull_request:
+    branches:
+      - master
+    paths:
+      - '**/yb-ctl*'
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  yb-ctl-test:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [ macos-latest, ubuntu-18.04 ]
+        python-version: [ 2.7, 3.8 ]
+
+    steps:
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - uses: actions/checkout@v2
+
+      - name: Run yb-ctl-test
+        run: |
+          set -x
+          tmpdir=$(mktemp -d)
+          cp -r scripts/installation "${tmpdir}/"
+          cd "${tmpdir}/installation"
+          test/yb-ctl-test.sh

.gitmodules

@@ -1,6 +1,3 @@
-[submodule "submodules/yugabyte-installation"]
-	path = submodules/yugabyte-installation
-	url = https://github.com/yugabyte/yugabyte-installation.git
 [submodule "submodules/yugabyte-bash-common"]
 	path = submodules/yugabyte-bash-common
 	url = https://github.com/yugabyte/yugabyte-bash-common.git

bin/yb-ctl

@@ -26,4 +26,4 @@ set -euo pipefail
 set_sanitizer_runtime_options
 
 # Invoke the actual yb-ctl script.
-"$YB_SRC_ROOT"/submodules/yugabyte-installation/bin/yb-ctl "$@"
+"$YB_SRC_ROOT"/scripts/installation/bin/yb-ctl "$@"