feat: add optional pprof listeners to servers

[paulstuart]

If the service pprof environment variable is set with a valid listening address:port it will provide http pprof endpoints for analyzing live servers.

In service of OBS-1991

[github-actions]

Go test coverage

STATUS	ELAPSED	PACKAGE	COVER	PASS	FAIL	SKIP
🟢 PASS	1.29s	github.com/netboxlabs/diode/diode-server/auth	44.7%	42	0	0
🟢 PASS	1.23s	github.com/netboxlabs/diode/diode-server/auth/cli	0.0%	0	0	0
🟢 PASS	1.02s	github.com/netboxlabs/diode/diode-server/authutil	82.8%	5	0	0
🟢 PASS	0.12s	github.com/netboxlabs/diode/diode-server/dbstore/postgres	0.0%	0	0	0
🟢 PASS	1.08s	github.com/netboxlabs/diode/diode-server/entityhash	86.7%	16	0	0
🟢 PASS	1.19s	github.com/netboxlabs/diode/diode-server/entitymatcher	83.0%	80	0	0
🟢 PASS	0.22s	github.com/netboxlabs/diode/diode-server/errors	0.0%	0	0	0
🟢 PASS	1.28s	github.com/netboxlabs/diode/diode-server/ingester	82.7%	25	0	0
🟢 PASS	1.09s	github.com/netboxlabs/diode/diode-server/matching	61.6%	17	0	0
🟢 PASS	1.07s	github.com/netboxlabs/diode/diode-server/migrator	70.4%	4	0	0
🟢 PASS	4.20s	github.com/netboxlabs/diode/diode-server/netboxdiodeplugin	83.6%	40	0	0
🟢 PASS	0.16s	github.com/netboxlabs/diode/diode-server/pprof	0.0%	0	0	0
🟢 PASS	2.66s	github.com/netboxlabs/diode/diode-server/reconciler	56.5%	124	0	0
🟢 PASS	1.02s	github.com/netboxlabs/diode/diode-server/reconciler/applier	85.7%	1	0	0
🟢 PASS	0.12s	github.com/netboxlabs/diode/diode-server/reconciler/changeset	0.0%	0	0	0
🟢 PASS	1.08s	github.com/netboxlabs/diode/diode-server/reconciler/differ	63.8%	6	0	0
🟢 PASS	1.02s	github.com/netboxlabs/diode/diode-server/server	85.7%	14	0	0
🟢 PASS	1.01s	github.com/netboxlabs/diode/diode-server/strcase	100.0%	24	0	0
🟢 PASS	1.03s	github.com/netboxlabs/diode/diode-server/telemetry	28.0%	26	0	0
🟢 PASS	1.03s	github.com/netboxlabs/diode/diode-server/telemetry/otel	91.7%	25	0	0
🟢 PASS	0.14s	github.com/netboxlabs/diode/diode-server/tls	0.0%	0	0	0
🟢 PASS	1.01s	github.com/netboxlabs/diode/diode-server/version	100.0%	2	0	0

Total coverage: 54.9%