feat(netdev): support regex DeviceList matching

[jasen11]

Problem

DeviceList is documented and used as a whitelist for selected network devices, but several implementations only used exact string matching.

For example, this config could not match eth0:

DeviceList = ["eth[0-9]+"]

The previous behavior was equivalent to:

slices.Contains([]string{"eth[0-9]+"}, "eth0") // false

This made it hard to configure groups of devices such as eth0, eth1, bond0, etc. with regex patterns.

## Problem Reproduction

Before the fix:

current exact match: false
expected regex match: true

The old exact-match call sites were:

- core/events/netdev_events.go
- core/metrics/netdev_hw.go
- core/metrics/netdev_dcb.go

## Fix

This PR adds a shared ListMatcher in internal/matcher.

Behavior:

- Each DeviceList entry is treated as a regular expression.
- Matching is anchored to the full device name.
- Existing exact entries such as "eth0" still match only eth0.
- Regex entries such as "eth[0-9]+" match eth0, eth1, etc.
- Empty DeviceList keeps the existing behavior of matching no devices.

The matcher is applied to:

- EventTracing.Netdev
- MetricCollector.NetdevDCB
- MetricCollector.NetdevHW

The config file and configuration docs were also updated to describe the matching behavior.

## Tests

Added unit coverage for:

- empty list matches nothing
- exact device names still use exact-match behavior
- regex device patterns match expected devices
- invalid regex patterns return an error

Verified with:

go test ./internal/matcher ./core/events ./core/metrics
make build