fix(tracemetrics): Update pii scrubbing

[k-fish]

This updates pii scrubbing to use the eap pii scrub package just like scrub_log does now, and adds some more tests to ensure pii scrubbing is happening properly before we add UI.

[Dav1dde]

For assertion we started more and more to go towards asserting the entire items, or bigger keys of an item, for example in this ourlogs test:

relay/tests/integration/test_ourlogs.py

Lines 505 to 533 in b8f863f

	assert item == {
	"trace_id": "5b8efff798038103d269b633813fc60c",
	"span_id": "eee19b7ec3c1b174",
	"attributes": {
	"test_pii": {"type": "string", "value": expected_scrubbed},
	"sentry.browser.name": {"type": "string", "value": "Python Requests"},
	"sentry.browser.version": {"type": "string", "value": "2.32"},
	"sentry.observed_timestamp_nanos": {
	"type": "string",
	"value": time_within(ts, expect_resolution="ns"),
	},
	},
	"__header": {"byte_size": mock.ANY},
	"_meta": {
	"attributes": {
	"test_pii": {
	"value": {
	"": {
	"len": mock.ANY,
	"rem": [[rule_type, mock.ANY, mock.ANY, mock.ANY]],
	}
	}
	}
	},
	},
	"body": "Test log",
	"level": "info",
	"timestamp": time_within(ts),
	}

This often is barely more lines of code, but it is also less error prone (e.g. no need to check the length/size to check for additional keys) and it covers more regression cases.