Copy .git in deploysource provider

[Warashi]

What this PR does:

This PR partially reverts #5412.

Why we need it:

In #5412, I implemented that the piped does not copy .git in the deploysource provider's copy method.
This made a breaking change on the SCRIPT_RUN stage.
Before #5412, we can use the git command to retrieve manifest repository information.
After #5412, we cannot do that because there is not .git.
In #5412, I implemented the git client to use git worktree to clone from the locally cached git repository, so it's a small cost to copy the .git because it's a small text file.

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[Warashi]

With this PR, we can use git command in the SCRIPT_RUN stage.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 26.26%. Comparing base (bcdba1f) to head (f82406a).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/app/piped/deploysource/deploysource.go	0.00%	1 Missing ⚠️
pkg/app/pipedv1/deploysource/deploysource.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5442   +/-   ##
=======================================
  Coverage   26.25%   26.26%           
=======================================
  Files         452      452           
  Lines       48860    48842   -18     
=======================================
  Hits        12827    12827           
+ Misses      35008    34990   -18     
  Partials     1025     1025           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[ffjlabo]

@Warashi
[Ask] Is it possible to get the right output for git log inside the dir in which .git file is placed ?
It means that can we do git log inside project_root_dir/hoge?

.git
project_root_dir/hoge

The script run stage executes commands on the app dir, which is not necessarily the project root.

[Warashi]

@ffjlabo
Yes. Do you consider we can use git without changing the directory like cd .. in the SCRIPT_RUN stage? We can do this. Here is the screenshot.

[ffjlabo]

@Warashi
Thanks, that's what I want to confirm.

[ffjlabo]

👍