Cleanup git tests (#19737)

* Cleanup git tests
* Split git tests in seperate files
* Remove use of repo_depth_url
* Use native yaml
* Remove unnecessary remote/local clones
* Fix newlines for yamllint
* If the hash is valid (full-length) but doesn't exist, git returns 128 instead of 1.
* Ensure git doesn't use hardlinks for shallow clones

test/integration/targets/git/tasks/setup.yml

@@ -0,0 +1,28 @@
+---
+
+- name: clean out the output_dir
+  file:
+    path: "{{ output_dir }}"
+    state: absent
+
+- name: create clean output_dir
+  file:
+    path: "{{ output_dir }}"
+    state: directory
+
+- name: verify that git is installed so this test can continue
+  shell: which git
+
+- name: get git version, only newer than {{git_version_supporting_depth}} has fixed git depth
+  shell: git --version | grep 'git version' | sed 's/git version //'
+  register: git_version
+
+- name: get gpg version
+  shell: gpg --version 2>1 | head -1 | sed -e 's/gpg (GnuPG) //'
+  register: gpg_version
+
+- name: set dummy git config
+  shell: git config --global user.email "noreply@example.com"; git config --global user.name "Ansible Test Runner"
+
+- name: create repo_dir
+  file: path={{repo_dir}} state=directory