Add option for configuring PR settings in add/update profile

[aclevername]

Closes: #1311

TODO: looking into updating acceptance test to check the PR settings, but might be overkill

What changed?
You can now configure the title, commit message, descripton and branch a PR is created on for add/update profiles

Why?
so you can customise the PR to meet your company standards. Also brings the PR flags in-line with what is available for add cluster

How did you test it?
manually:
add:

bin/gitops add profile --name podinfo --version 6.0.0 --namespace wego-system --cluster kind-e4xmcn --config-repo git@github.com:weaveworks-gitops-test/test-app-229w99at.git --base my-pr-branch --branch main --commit-message comitme --description "dogs>cats" --title="golden retreivers are the best"
► getting available profiles in kind-e4xmcn/wego-system
► created Pull Request: https://github.com/weaveworks-gitops-test/test-app-229w99at/pull/5
Adding profile:

Name: podinfo
Version: 6.0.0
Cluster: kind-e4xmcn
Namespace: wego-system

Update:

bin/gitops update profile --name podinfo --version 6.0.1 --namespace wego-system --cluster kind-e4xmcn --config-repo git@github.com:weaveworks-gitops-test/test-app-229w99at.git --base my-pr-branch-2 --branch main --commit-message comitmeAGAIN --description "seriosuly though dogs>cats" --title="SERIOUSLY golden retreivers are the best"

► getting available profiles in kind-e4xmcn/wego-system
► created Pull Request: https://github.com/weaveworks-gitops-test/test-app-229w99at/pull/6
Updating profile:

Name: podinfo
Version: 6.0.1
Cluster: kind-e4xmcn
Namespace: wego-system

Release notes
Add support for configuring PR options during add/update profile

Documentation Changes
no (the flags are enough documentation IMO)

[Himangini]

LGTM, nice refactor 👍🏻