fix: Bootstrap defaults

[juanjosevazquezgil]

This pull request introduces improvements to repository management and branch protection settings in the bootstrap templates. The main changes are enabling automated repository maintenance features and adjusting branch protection requirements.

Repository configuration enhancements:

• Enabled allowAutoMerge, deleteBranchOnMerge, and allowUpdateBranch options in the repository settings to streamline merging and branch maintenance (firestartr-bootstrap/templates/components.tmpl).

Branch protection policy adjustments:

• Set enforceAdmins to false in the branch protection settings, so admin users are no longer required to follow all protection rules (firestartr-bootstrap/templates/crs_config/expander_branch_strategies.tmpl).

Discussed with @alambike via Google Chat. We reached the conclusion it'd better if this parameter was set to false. The parameters added to the components.tmpl template were requested by @jotasixto after multiple bootstrappings in various clients. They were set to true manually in most of them

[jotasixto]

LGMT!