move GH testing script from top level into connector directory (#5938)

airbyte-integrations/connectors/source-github/fixtures/scripts/create_branches_and_commits.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+touch ".gitignore"
+git add ".gitignore"
+git commit -m "Initial commit"
+git push origin master
+
+for (( i = 0; i < 5; i++ )); do
+    git branch "feature/branch_$i"
+done
+
+for (( i = 0; i < 5; i++ )); do
+  git checkout "feature/branch_$i"
+    mkdir github_sources
+    for (( j = 0; j < 5; j++ )); do
+        echo "text_for_file_$j_commit" > "github_sources/file_$j.txt"
+        git add github_sources
+        git commit -m "commit number $j"
+        git push origin "feature/branch_$i"
+    done
+done

airbyte-integrations/connectors/source-github/fixtures/scripts/init_repository.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+if git status
+then
+  echo "Repository already initialized"
+elif [ ! "$1" ]
+then
+    echo "No repository url was provided"
+else
+  git init
+  git remote add origin "$1"
+  echo "Initialized repository $1"
+fi