Update UCI access and rename identifier for firewall bouncer

[leow149]

• This PR is not from my main or master branch 💩, but a separate branch ✅
• Each commit has a valid ✒️ Signed-off-by: <my@email.address> row (via git commit --signoff)
• Each commit and PR title has a valid 📝 <package name>: title first line subject for packages
• Incremented 🆙 any PKG_VERSION in the Makefile
• Tested on: mediatek/filogic (Banana Pi BPI-R4), OpenWrt 25.12.0-rc5 ✅
• ( Preferred ) Mention: @ne20002
• ( Preferred ) Screenshot or mp4 of changes:
• ( Optional ) Closes: e.g. openwrt/luci#issue-number
• ( Optional ) Depends on: crowdsec-firewall-bouncer: fix config file conflict with crowdsec package packages#28991
• Description: Update UCI config name from crowdsec to crowdsec-firewall-bouncer in
  form.js and the rpcd ACL file, to match the config file rename in the companion packages PR
  crowdsec-firewall-bouncer: fix config file conflict with crowdsec package packages#28991. Without this change, the LuCI app would silently read and write from
  the wrong UCI config file.

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Commit f3e8525

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Commit fbec9e9

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• ❌ Commit subject line MUST start with <package name>:
• ❌ Signed-off-by email cannot be a GitHub noreply email
• ❌ Commit message is missing. Please describe your changes.

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