fix: add file path to filelog/agent-config receiver (#156)

### Description

Add file path to filelog/agent-config receiver. Our provided content
extracts this field as a separate column, so we should set this
attribute in all provided receivers.

Author: obs-gh-mattcotter

packaging/docker/observe-agent/connections/self_monitoring/logs_and_metrics.yaml

@@ -1,6 +1,7 @@
 receivers:
   filelog/agent-config: # TODO: Add observe-agent.yaml once we can obfuscate sensitive config fields
     include: [/etc/observe-agent/otel-collector.yaml]
+    include_file_path: true
     start_at: beginning
     poll_interval: 5m
     multiline:

packaging/linux/etc/observe-agent/connections/self_monitoring/logs_and_metrics.yaml

@@ -1,6 +1,7 @@
 receivers:
   filelog/agent-config: # TODO: Add observe-agent.yaml once we can obfuscate sensitive config fields
     include: [/etc/observe-agent/otel-collector.yaml]
+    include_file_path: true
     start_at: beginning
     poll_interval: 5m
     multiline:

packaging/macos/connections/self_monitoring/logs_and_metrics.yaml

@@ -1,6 +1,7 @@
 receivers:
   filelog/agent-config: # TODO: Add observe-agent.yaml once we can obfuscate sensitive config fields
     include: [/usr/local/observe-agent/config/otel-collector.yaml]
+    include_file_path: true
     start_at: beginning
     poll_interval: 5m
     multiline:

packaging/windows/connections/self_monitoring/logs_and_metrics.yaml

@@ -1,6 +1,7 @@
 receivers:
   filelog/agent-config: # TODO: Add observe-agent.yaml once we can obfuscate sensitive config fields
     include: ['C:\Program Files\Observe\observe-agent\config\otel-collector.yaml']
+    include_file_path: true
     start_at: beginning
     poll_interval: 5m
     multiline: