Fix branch matching when there is a slashes in the base branch name

[savitaashture]

Changes

Steps:

1. have a branch name like pac/test/111/main in your project repo
2. in Pipelinerun

    pipelinesascode.tekton.dev/on-event: "[pull_request, push]"
    pipelinesascode.tekton.dev/on-target-branch: "[pac/test/111/main]"

3. Create pull request runs CI
4. Merging PR don't run CI

Submitter Checklist

• ♽ 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 #1363 (51a453c) into main (89c385b) will increase coverage by 0.29%.
Report is 8 commits behind head on main.
The diff coverage is 86.76%.

@@            Coverage Diff             @@
##             main    #1363      +/-   ##
==========================================
+ Coverage   60.43%   60.73%   +0.29%     
==========================================
  Files         135      136       +1     
  Lines        9796     9916     +120     
==========================================
+ Hits         5920     6022     +102     
- Misses       3394     3411      +17     
- Partials      482      483       +1     

Files Changed	Coverage Δ
pkg/provider/gitea/gitea.go	6.69% <0.00%> (-0.04%)	⬇️
pkg/provider/bitbucketcloud/bitbucket.go	71.29% <33.33%> (-0.69%)	⬇️
pkg/provider/bitbucketserver/bitbucketserver.go	77.08% <33.33%> (-0.82%)	⬇️
pkg/provider/gitlab/gitlab.go	71.17% <33.33%> (-0.65%)	⬇️
pkg/reconciler/reconciler.go	21.38% <50.00%> (ø)
pkg/provider/gitea/acl.go	74.79% <76.19%> (+0.40%)	⬆️
pkg/provider/github/acl.go	86.06% <89.18%> (+0.78%)	⬆️
pkg/policy/policy.go	92.30% <92.30%> (ø)
pkg/provider/github/detect.go	92.30% <94.59%> (+0.37%)	⬆️
pkg/matcher/annotation_matcher.go	95.42% <100.00%> (+2.09%)	⬆️
... and 4 more

[savitaashture]

/retest