Adjusting systemd unit files to avoid hardcoded UID in the runtime dir path (#461)

* Update install_services.sh

Replaced hardcoded uid

* Update install_services.sh

avoid uid in /run path

* Update install_services.sh

had to use $(id)

* Update update_birdnet_snippets.sh

Remove XDG_RUNTIME_DIR from templates

* removed XDG_RUNTIME_DIR

* update HIDE_MOUNTS runtime paths

uid agnostic

* typos

scripts/install_services.sh

@@ -119,7 +119,6 @@ install_recording_service() {
 [Unit]
 Description=BirdNET Recording
 [Service]
-Environment=XDG_RUNTIME_DIR=/run/user/1000
 Restart=always
 Type=simple
 RestartSec=3
@@ -138,7 +137,6 @@ install_custom_recording_service() {
 [Unit]
 Description=BirdNET Custom Recording
 [Service]
-Environment=XDG_RUNTIME_DIR=/run/user/1000
 Restart=always
 Type=simple
 RestartSec=3
@@ -365,7 +363,6 @@ Description=BirdNET-Pi Live Stream
 After=network-online.target
 Requires=network-online.target
 [Service]
-Environment=XDG_RUNTIME_DIR=/run/user/1000
 Restart=always
 Type=simple
 RestartSec=3