Handle branch name with slash

[chmouel]

We now allow users to specify a remote GitHub URL to be fetched using a token, even if the branch name contains a slash. The user can URL encoding the slash within the branch name to ensure a proper parsing by paac.

ie:

https://github.com/organization/repository/blob/feature%2Fmainbranch/path/file

Fixes #1395

Changes

Submitter Checklist

• 📝 A good commit message is important for other reviewers to understand the context of your change. Please refer to How to Write a Git Commit Message for more details how to write beautiful commit messages. We rather have the commit message in the PR body and the commit message instead of an external website.
• ♽ Run make test before submitting a PR (ie: with pre-commit, no need to waste CPU cycle on CI. (or even better install pre-commit and do pre-commit install in the root of this repo).
• ✨ We heavily rely on linters to get our code clean and consistent, please ensure that you have run make lint before submitting a PR. The markdownlint error can get usually fixed by running make fix-markdownlint (make sure it's installed first)
• 📖 If you are adding a user facing feature or make a change of the behavior, please verify that you have documented it
• 🧪 100% coverage is not a target but most of the time we would rather have a unit test if you make a code change.
• 🎁 If that's something that is possible to do please ensure to check if we can add a e2e test.
• 🔎 If there is a flakiness in the CI tests then don't necessary ignore it, better get the flakyness fixed before merging or if that's not possible there is a good reason to bypass it. (token rate limitation may be a good reason to skip).

[codecov]

Codecov Report

Merging #1396 (33b6b70) into main (03bdd33) will decrease coverage by 0.08%.
The diff coverage is 25.00%.

@@            Coverage Diff             @@
##             main    #1396      +/-   ##
==========================================
- Coverage   61.28%   61.20%   -0.08%     
==========================================
  Files         136      136              
  Lines       10026    10045      +19     
==========================================
+ Hits         6144     6148       +4     
- Misses       3389     3399      +10     
- Partials      493      498       +5     

Files Changed	Coverage Δ
pkg/provider/github/github.go	74.32% <25.00%> (-2.89%)	⬇️

[savitaashture]

/lgtm

[savitaashture]

Suggested change

	url: "https://github.com/openshift-pipelines/pipelines-as-code/blob/%F0%9F%99%83/filename.yaml",
	url: "https://github.com/openshift-pipelines/pipelines-as-code/blob/%F0%9F%99%83/filename.yaml",

%F0%9F%99%83

are these standard code for emoji ?

[savitaashture]

Ah i asked chat gpt 😁

The text "%F0%9F%99%83" is a URL-encoded representation of the emoji